“I've been doing research in generative models for like basically my entire career.”
Claim: Stefano Ermon has conducted research in generative models for essentially his entire career.
As generative AI hits hardware and latency bottlenecks, Stanford professor, diffusion pioneer, and Inception co-founder and CEO Stefano Ermon is betting on a radical new architecture. Stefano joins Sarah Guo to talk about Inception, and how his team is applying diffusion architecture beyond images and video into discrete text and code generation. Stefano explains the limitations of autoregressive LLMs, as well as why parallel token generation in diffusion models offers superior inference scaling and hardware utilization on standard GPUs. He also shares details about Inception’s Mercury models, real-world voice agent applications, the software stack required to serve diffusion-based models at scale, academia’s role at the frontier of AI innovations, and why the next era of AI competition will be defined by efficiency.
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Chapters:
00:00 – Stefano Ermon Introduction
00:35 – Research Background
02:54 – Starting Inception
05:59 – Why Diffusion Beats Autoregressive
11:10 – Discrete vs. Continuous Modalities
13:19 – Inception Today
16:45 – Where Speed Wins
17:31 – Inception Customer Base
18:49 – Interaction with Hardware Landscape
19:34 – Inception and the Broader Industry
21:41 – Data Compression and Structure
24:45 – Controllability of Diffusion Modeles
27:25 – Emergent Capabilities at Scale
29:02 – Future Workload Split Between Diffusion vs. Traditional
30:03 – Adoption Challenges
31:44 – Hiring and Team Organization
32:50 – Recursive Self Improvement
34:02 – Resource Allocation
35:10 – Impact of Academia
38:13 – Conclusion
18 Sept 2026 · 38:13 · transcript: transcribed
In the order they were said
“I've been doing research in generative models for like basically my entire career.”
Claim: Stefano Ermon has conducted research in generative models for essentially his entire career.
“I started at Stanford in 2014 as an assistant professor and I was working on building generative models. Back then, the research area was not particularly”
“It's hot, you know, the models were not quite working well.”
Claim: When Ermon began at Stanford in 2014, generative models were not working very well.
“We were still like building little generative models over MNIST and it was like a big success if you could generate these grainy images of digits and, you know, it was even hard to publish papers back then on that topic and you had to kind of like justify training a generative model as a way to learn features from unlabeled data that then could maybe help you do better at supervised learning because”
“We were still like building little generative models over MNIST and it was like a big success if you could generate these grainy images of digits and, you know, it was even hard to publish papers back then on that topic and you had to kind of like justify training a generative model as a way to learn features from unlabeled data that then could maybe help you do better at supervised learning because because that was the thing that everybody cared about but then you know the things took over of course and so it was like a i was at the right place at the right time working on the right thing and so i've been doing research in in that space since since the beginning basically yeah”
“We were still like building little generative models over MNIST and it was like a big success if you could generate these grainy images of digits and, you know, it was even hard to publish papers back then on that topic and you had to kind of like justify training a generative model as a way to learn features from unlabeled data that then could maybe help you do better at supervised learning because”
“i mean i always felt like that was going to be the that was the right way to think about about kind of like learning from unlabeled data that like building a generative model is really the right way to make sure you understand the structure in the data that was kind of like the way I was getting at.”
“I was not even dreaming about the kind of capabilities that these LLMs that we that we have today could could could do that but I was thinking more from I think world models perspective like I was I was working a lot on images and so thinking about”
Claim: While working on images, Ermon thought about generative modeling in terms of world models.
“I was not even dreaming about the kind of capabilities that these LLMs that we that we have today could could could do that but I was thinking more from I think world models perspective like I was I was working a lot on images and so thinking about”
Claim: Ermon did not anticipate the capabilities that today's large language models would achieve.
“like I have a world model, I can imagine what's going to happen if I were to stand up and walk out the door,”
“like I can kind of like picture that in my mind and that's important to make decisions and kind of like model predictive control when having this kind of model of the world requires some generative capabilities.”
Claim: Using a world model for model predictive control requires generative capabilities.
“like I can kind of like picture that in my mind and that's important to make decisions and kind of like model predictive control when having this kind of model of the world requires some generative capabilities.”
Claim: Imagining possible outcomes is important for decision-making and model predictive control.
“And so I always felt like, okay, that's the right direction to work on.”
Claim: Ermon believed generative modeling was the right research direction.
“I felt like this is going to be very hard as a problem. So it's going to keep me busy for my whole career and it's a good problem.”
Claim: Ermon expected generative modeling to be difficult enough to occupy his entire career.
“problem to work on and then of course I was very wrong and things evolved much faster than I was expecting.”
Claim: Generative modeling advanced much faster than Ermon had expected.
“Yeah so I was working on generative models of images initially working on autoregressive models which were very slow and kind of like very blurry and then VAEs and then GANs.”
Claim: Ermon's early autoregressive image-generation models were very slow and produced blurry images.
“and back then we were very unhappy with the state of generative models for images like the GANs were they they worked but they were very unstable to train very hard to reproduce results and so we were trying to see is there a way to build something that is as good as a GAN but it's more principled and so we started working on score-based the generative models which are basically what eventually became diffusion models back in 2019 with my PhD student Yang Song and so we kind of like came up with this idea of let's train a neural network to denoise images and if you can denoise an image then you really are understanding enough about the structure of the image that it should be possible to build like a generative procedure based on these denoisers and that basically became the kind of like underlying technology of”
“and back then we were very unhappy with the state of generative models for images like the GANs were they they worked but they were very unstable to train very hard to reproduce results and so we were trying to see is there a way to build something that is as good as a GAN but it's more principled and so we started working on score-based the generative models which are basically what eventually became”
“and back then we were very unhappy with the state of generative models for images like the GANs were they they worked but they were very unstable to train very hard to reproduce results and so we were trying to see is there a way to build something that is as good as a GAN but it's more principled and so we started working on score-based the generative models which are basically what eventually became”
Claim: Ermon's group sought a more principled image-generation method that could perform as well as a GAN.
“diffusion models back in 2019 with my PhD student Yang Song and so we kind of like came up with this idea of let's train a neural network to denoise images and if you can denoise an image then you really are understanding enough about the structure of the image that it should be possible to build like a generative procedure based on these denoisers and that basically became the kind of like underlying technology of”
“diffusion models back in 2019 with my PhD student Yang Song and so we kind of like came up with this idea of let's train a neural network to denoise images and if you can denoise an image then you really are understanding enough about the structure of the image that it should be possible to build like a generative procedure based on these denoisers and that basically became the kind of like underlying technology of”
“and back then we were very unhappy with the state of generative models for images like the GANs were they they worked but they were very unstable to train very hard to reproduce results and so we were trying to see is there a way to build something that is as good as a GAN but it's more principled and so we started working on score-based the generative models which are basically what eventually became diffusion models back in 2019 with my PhD student Yang Song and so we kind of like came up with this idea of let's train a neural network to denoise images and if you can denoise an image then you really are understanding enough about the structure of the image that it should be possible to build like a generative procedure based on these denoisers and that basically became the kind of like underlying technology of”
“diffusion models back in 2019 with my PhD student Yang Song and so we kind of like came up with this idea of let's train a neural network to denoise images and if you can denoise an image then you really are understanding enough about the structure of the image that it should be possible to build like a generative procedure based on these denoisers and that basically became the kind of like underlying technology of shift modern diffusion models where instead of generating images you know left to right one pixel at a time you kind of like start from pure noise and then you gradually refine the object until you get like a clean picture at the end and that started yeah back in 2019 in my lab and then it kind of like took over the space and even today the best models for image generation video generation music to some extent a lot of the protein stuff they are based on diffusion.”
“shift modern diffusion models where instead of generating images you know left to right one pixel at a time you kind of like start from pure noise and then you gradually refine the object until you get like a clean picture at the end and that started yeah back in 2019 in my lab and then it kind of like took over the space and even today the best models for image generation video generation music to some extent a lot of the protein stuff”
“shift modern diffusion models where instead of generating images you know left to right one pixel at a time you kind of like start from pure noise and then you gradually refine the object until you get like a clean picture at the end and that started yeah back in 2019 in my lab and then it kind of like took over the space and even today the best models for image generation video generation music to some extent a lot of the protein stuff”
“shift modern diffusion models where instead of generating images you know left to right one pixel at a time you kind of like start from pure noise and then you gradually refine the object until you get like a clean picture at the end and that started yeah back in 2019 in my lab and then it kind of like took over the space and even today the best models for image generation video generation music to some extent a lot of the protein stuff they are based on diffusion.”
“And so my group has worked a lot on various kinds of diffusion models, technique for accelerating them to generate samples very quickly, to improve the quality of these models.”
“And so my group has worked a lot on various kinds of diffusion models, technique for accelerating them to generate samples very quickly,”
Claim: Ermon's group developed techniques to accelerate diffusion models and generate samples more quickly.
“to improve the quality of these models.”
Claim: Ermon's group worked to improve diffusion-model quality.
“And so since we were able to get them to work on images, I started thinking about how do we get diffusion models to work on text or code generation and discrete objects. Like, is there a way to move beyond autoregressive models? goes to something that it's more parallel, more with built-in error correction.”
“And so since we were able to get them to work on images, I started thinking about how do we get diffusion models to work on text or code generation and discrete objects.”
“Like, is there a way to move beyond autoregressive models? goes to something that it's more parallel, more with built-in error correction.”
“And so I've been doing a bunch of research at Stanford on getting diffusion models to work on text and code generation.”
Claim: Ermon conducted research at Stanford on using diffusion models for text and code generation.
“We had a breakthrough in 2024.”
Claim: Ermon's group achieved a breakthrough in diffusion-model research in 2024.
“We had a breakthrough in 2024. We published a paper basically showing that for the first time it was possible to match the quality of an autoregressive model at the GPT-2 scale. So less than a billion parameters,”
“We published a paper basically showing that for the first time it was possible to match the quality of an autoregressive model at the GPT-2 scale.”
“So less than a billion parameters,”
Claim: The diffusion model in Ermon's GPT-2-scale work had fewer than one billion parameters.
“but we were able to train basically still a transformer model as a diffusion model on the same data, we were able to match the quality, like the same perplexity, and you were fitting the data just as well as an autoregressive model with the same number of parameters,”
“but we were able to train basically still a transformer model as a diffusion model on the same data,”
“we were able to match the quality, like the same perplexity, and you were fitting the data just as well as an autoregressive model with the same number of parameters,”
“but the diffusion model was significantly faster. Because it's diffusion, because you're outputting many tokens at the same time, we were able to generate text.”
“but the diffusion model was significantly faster.”
“Because it's diffusion, because you're outputting many tokens at the same time, we were able to generate text.”
Claim: The diffusion model generated text by outputting many tokens simultaneously.
“Then X-Faster compared to the auto-aggressive model and so that felt very very exciting and I really wanted to see what happens if you scale up, if you train bigger models and so I started Inception,”
“Then X-Faster compared to the auto-aggressive model and so that felt very very exciting and I really wanted to see what happens if you scale up, if you train bigger models and so I started Inception, a company to basically scale up the technology and then try to build commercial scale diffusion based language models.”
“Then X-Faster compared to the auto-aggressive model and so that felt very very exciting and I really wanted to see what happens if you scale up, if you train bigger models and so I started Inception, a company to basically scale up the technology and then try to build commercial scale diffusion based language models.”
“Then X-Faster compared to the auto-aggressive model and so that felt very very exciting and I really wanted to see what happens if you scale up, if you train bigger models and so I started Inception,”
“the ways of building generative models, there is autoregressive, where you kind of like have a model that predicts the next token or the next pixel, and then you generate left to right one token at a time, and then there's diffusion, which is a coarse-to-fine generation, kind of like iterative denoising kind of generation,”
“and as you said, like we have continuous modalities where diffusion dominate, there is discrete modalities, text and code.”
Claim: Diffusion models dominate continuous modalities; text and code are discrete modalities.
“primarily like all the big labs are kind of like betting on the same architecture autoregressive models and as we move towards more and more like multimodal models and kind of like there is this idea that maybe we'll have a model that can handle all modalities and we'll know everything about the world”
“What architecture would that be? Like will it be another regressive model? Will it be a diffusion model? Nobody knows. I think that I think the jury is still out there.”
“At inception, we're betting on diffusion models because we believe that what matters eventually will be inference time scaling. And there are fundamental reasons for why diffusion models are better than autoregressive models at inference time.”
“There was an inflection point in 2017 when people switched from RNNs to transformers, right? The problem was that RNNs had to essentially process tokens sequentially one at a time, and training was very slow.”
“And so people came up with this idea of let's have an architecture that allows you to process many tokens at the same time in parallel. And that was a transformer. And that was the thing that scaled better for training and that enabled a lot of the successes behind LLMs.”
“Auto-regressive models are still sequential. The computation is one left to right one token at a time. You cannot generate the 10th token until you've generated everything that comes before it.”
“That kind of workload does not map well to GPUs. That kind of workload is extremely memory bound. You're spending most of your time moving around weights across the memory hierarchy and you're doing very little. a little arithmetic, and that's a fundamental problem of autoregressive models.”
“the equivalent at inference time is a diffusion base, is a diffusion model, because a diffusion model is built to have at inference time a workload where you process many tokens at the same time.”
Claim: Diffusion models are designed to process many tokens in parallel during inference.
“And so the workload that we have at inference time in a diffusion model It's basically very, very similar to the workload you have for training, where you're processing many tokens at the same time in parallel.”
“And so it's built to essentially have an inference workload that maps really, really well too. Mac models, but the kind of things GPUs do really, really well.”
Claim: Diffusion models have inference workloads that map well to operations GPUs perform well.
“And so we bet on trying to build the architecture and trying to build the kind of models that will scale best at inference time because, you know, economics are dominated by, you know, the kind of intelligence per watt, the intelligence per dollar that you're able to get from the models. If you think about a lot of the advances with the reasoning models,”
“the intelligence per dollar that you're able to get from the models. If you think about a lot of the advances with the reasoning models, a lot of it is scaling test and compute,”
Claim: The speaker says that many advances in reasoning models come from scaling test-time compute.
“So being able to scale better along that axis will also matter.”
Claim: The speaker expects the ability to scale test-time compute more effectively to matter.
“And even if you think about RL post-training, a lot of the bottleneck is generating rollouts, like letting the model explore.”
“And so inference is again a key bottleneck for RL push training.”
Claim: Inference is a key bottleneck in reinforcement-learning post-training.
“And so if you have a model that scales better at inference time, then automatically you're going to get better scaling during RL push training.”
“And so that's why we decided to bet on a diffusion-based LLM because it's inherently more parallel and the bitter lesson is that the more parallel solution is the one. And is the one that is eventually going to win.”
“Yeah, so there was a lot of research that went into figuring out how to apply a technology that was inherently very tied to kind of like continuous structure in the data. So if you think about a diffusion model, it's learning how to denoise images and it kind of like makes sense for continuous data because if you think about... even two pixel colors you can kind of like interpolate between them and it will still make sense but if you think about two words there is not necessarily something in between them right it's all discrete and so it required a lot of R&D and a new science that had to be developed to figure out how to how to extend those kind of ideas to discrete spaces.”
“even two pixel colors you can kind of like interpolate between them and it will still make sense but if you think about two words there is not necessarily something in between them right it's all discrete and so it required a lot of R&D and a new science that had to be developed to figure out how to how to extend those kind of ideas to discrete spaces.”
“We think it works really well so we've been able to to train train diffusion-based LLMs that are comparable in quality with the speed optimized models for frontier labs.”
“So our Mercury models are on par with the Heiku models, Flash models, meaning HANA models from OpenAI, if you look at benchmarks, while being significantly faster.”
“actually use the like we are serving these models in production today we did all the work of figuring out how to even just like build a serving engine right you cannot run this diffusion-based LLMs on the LLM or SG language you have we have to build our own serving engine and we can handle a lot of the complexity of like real production workloads and we've solved all these challenges and we can deliver this kind of new experience yes end to end to to real customers today yeah”
“so it's we are about two years old around 50 people spending a lot of time still on r d kind of like figuring out what's the right way to train these models how to accelerate inference like it's not obvious how you”
“so it's we are about two years old around 50 people spending a lot of time still on r d kind of like figuring out what's the right way to train these models how to accelerate inference like it's not obvious how you”
Claim: At the time of the conversation, Inception was about two years old and had around 50 people.
“you need to think about an autoregressive model it's pretty clear there's not a lot of things you can do there in terms of like okay you generate one token at a time and that's it in a diffusion based model we know that there is a lot of different”
“you need to think about an autoregressive model it's pretty clear there's not a lot of things you can do there in terms of like okay you generate one token at a time and that's it in a diffusion based model we know that there is a lot of different possibilities for training compute for quality at inference time like even if you think about image diffusion models or video diffusion models there is a lot of techniques that you can use to kind of like accelerate sampling of distillation or like fancy differential equation solving techniques that allow you to sample very very quickly from these models and so there is a lot of research on the training on the inference and then engineering like just”
“possibilities for training compute for quality at inference time like even if you think about image diffusion models or video diffusion models there is a lot of techniques that you can use to kind of like accelerate sampling of distillation or like fancy differential equation solving techniques that allow you to sample very very quickly from these models and so there is a lot of research on the training on the inference and then engineering like just”
“possibilities for training compute for quality at inference time like even if you think about image diffusion models or video diffusion models there is a lot of techniques that you can use to kind of like accelerate sampling of distillation or like fancy differential equation solving techniques that allow you to sample very very quickly from these models and so there is a lot of research on the training on the inference and then engineering like just Just like thinking about data mixes, evals, RL, post-training infrastructure, like there is a lot of work that needs to happen to figure out how to build the recipes that work for this new model.”
“possibilities for training compute for quality at inference time like even if you think about image diffusion models or video diffusion models there is a lot of techniques that you can use to kind of like accelerate sampling of distillation or like fancy differential equation solving techniques that allow you to sample very very quickly from these models and so there is a lot of research on the training on the inference and then engineering like just Just like thinking about data mixes, evals, RL, post-training infrastructure, like there is a lot of work that needs to happen to figure out how to build the recipes that work for this new model.”
“possibilities for training compute for quality at inference time like even if you think about image diffusion models or video diffusion models there is a lot of techniques that you can use to kind of like accelerate sampling of distillation or like fancy differential equation solving techniques that allow you to sample very very quickly from these models and so there is a lot of research on the training on the inference and then engineering like just”
“And we try to leverage existing things as much as possible.”
Claim: Inception aims to reuse existing tools and work wherever possible.
“And we try to leverage existing things as much as possible. uh we still use a lot of the public data sets that people have created and evals and benchmarks so you know we're a startup we try to be scrappy we try to use existing things as much as possible and kind of like focus on the on the the aspects where we can have the highest impact and then where we can be the most differentiated and right now it's speed in the future who knows like it's possible that a diffusion based language model will be”
“it's still a transformer-based model, so you don't have to throw away a lot of the work that has been done on good architectures. We still use attention.”
“it's still a transformer-based model, so you don't have to throw away a lot of the work that has been done on good architectures. We still use attention.”
Claim: Inception's diffusion-based language model is transformer-based and uses attention.
“it's still a transformer-based model, so you don't have to throw away a lot of the work that has been done on good architectures.”
“uh we still use a lot of the public data sets that people have created and evals and benchmarks so you know we're a startup we try to be scrappy we try to use existing things as much as possible and kind of like focus on the on the the aspects where we can have the highest impact and then where we can be the most differentiated and right now it's speed in the future who knows like it's possible that a diffusion based language model will be”
“uh we still use a lot of the public data sets that people have created and evals and benchmarks so you know we're a startup we try to be scrappy we try to use existing things as much as possible and kind of like focus on the on the the aspects where we can have the highest impact and then where we can be the most differentiated and right now it's speed in the future who knows like it's possible that a diffusion based language model will be be maybe significantly more intelligent than an autoregressive one like nobody knows that that's why i think this is very exciting because we're developing these really powerful ai systems but it's all very fresh it's all very new uh i doubt we've discovered the best way of building these systems there's got to be alternative there's got to be other ways of building these models and and eventually yeah efficiency will be very important like if you think about the ai factor”
“uh we still use a lot of the public data sets that people have created and evals and benchmarks so you know we're a startup we try to be scrappy we try to use existing things as much as possible and kind of like focus on the on the the aspects where we can have the highest impact and then where we can be the most differentiated and right now it's speed in the future who knows like it's possible that a diffusion based language model will be be maybe significantly more intelligent than an autoregressive one like nobody knows that that's why i think this is very exciting because we're developing these really powerful ai systems but it's all very fresh it's all very new uh i doubt we've discovered the best way of building these systems there's got to be alternative there's got to be other ways of building these models and and eventually yeah efficiency will be very important like if you think about the ai factor”
“uh we still use a lot of the public data sets that people have created and evals and benchmarks so you know we're a startup we try to be scrappy we try to use existing things as much as possible and kind of like focus on the on the the aspects where we can have the highest impact and then where we can be the most differentiated and right now it's speed in the future who knows like it's possible that a diffusion based language model will be”
“uh we still use a lot of the public data sets that people have created and evals and benchmarks so you know we're a startup we try to be scrappy we try to use existing things as much as possible and kind of like focus on the on the the aspects where we can have the highest impact and then where we can be the most differentiated and right now it's speed in the future who knows like it's possible that a diffusion based language model will be”
Claim: At the time of the conversation, Inception's primary area of differentiation was speed.
“be maybe significantly more intelligent than an autoregressive one like nobody knows that that's why i think this is very exciting because we're developing these really powerful ai systems but it's all very fresh it's all very new uh i doubt we've discovered the best way of building these systems there's got to be alternative there's got to be other ways of building these models and and eventually yeah efficiency will be very important like if you think about the ai factor”
“be maybe significantly more intelligent than an autoregressive one like nobody knows that that's why i think this is very exciting because we're developing these really powerful ai systems but it's all very fresh it's all very new uh i doubt we've discovered the best way of building these systems there's got to be alternative there's got to be other ways of building these models and and eventually yeah efficiency will be very important like if you think about the ai factor”
Claim: Efficiency will eventually be very important in AI systems.
“be maybe significantly more intelligent than an autoregressive one like nobody knows that that's why i think this is very exciting because we're developing these really powerful ai systems but it's all very fresh it's all very new uh i doubt we've discovered the best way of building these systems there's got to be alternative there's got to be other ways of building these models and and eventually yeah efficiency will be very important like if you think about the ai factor”
“be maybe significantly more intelligent than an autoregressive one like nobody knows that that's why i think this is very exciting because we're developing these really powerful ai systems but it's all very fresh it's all very new uh i doubt we've discovered the best way of building these systems there's got to be alternative there's got to be other ways of building these models and and eventually yeah efficiency will be very important like if you think about the ai factor”
“be maybe significantly more intelligent than an autoregressive one like nobody knows that that's why i think this is very exciting because we're developing these really powerful ai systems but it's all very fresh it's all very new uh i doubt we've discovered the best way of building these systems there's got to be alternative there's got to be other ways of building these models and and eventually yeah efficiency will be very important like if you think about the ai factor”
Claim: The speaker expects efficiency to become very important for AI systems.
“factory like how is that going to work I think nobody really knows and just being able to play in that space and thinking about alternative ways of creating intelligence I think it's exciting”
Claim: The speaker says it is not yet clear how the AI factory will work.
“factory like how is that going to work I think nobody really knows and just being able to play in that space and thinking about alternative ways of creating intelligence I think it's exciting”
Claim: The speaker considers exploring alternative ways to create intelligence exciting.
“factory like how is that going to work I think nobody really knows and just being able to play in that space and thinking about alternative ways of creating intelligence I think it's exciting”
Claim: The speaker believes that how an AI factory will work is not yet well understood.
“I just think if you if you fundamentally believe that we can use all of the power we have and there will be economic reasons to do so, then I think the focus on efficiency is going to go dramatically up.”
“You know, I think many people now argue like one of the most important decisions for a company in the AI space is like, how do we use the power we have between, you know, training and the most valuable use cases for any watt on that topic like here in.”
“Yeah, it is basically applications where latency matters.”
Claim: Speed is especially valuable in applications where latency matters.
“I think everyone cares about speed in the sense that if you can give me the same quality but faster, people will always pick the faster solution.”
Claim: People will choose a faster solution when it provides the same quality as a slower one.
“we're seeing it with these like faster versions of even the models from Frontier Labs people are willing to pay more to get access to faster models right and I think once you get used to a fast model it's hard to go back it's kind of like broadband right and then you get faster and faster and if you were able to try even the people cannot go back once you once you get the fast model”
Claim: Customers are willing to pay more for access to faster versions of models from frontier AI labs.
“we're seeing it with these like faster versions of even the models from Frontier Labs people are willing to pay more to get access to faster models right and I think once you get used to a fast model it's hard to go back it's kind of like broadband right and then you get faster and faster and if you were able to try even the people cannot go back once you once you get the fast model”
Claim: Users who become accustomed to a fast model find it difficult to return to a slower model.
“There are a few that we can mention, like in the voice space, for example, open call is an example. They are building like voice agents.”
“of course, the pipeline is like you have an ASR model, you have an LLM that it's kind of like doing all the tool calls and figuring out what to say next. And then there is a text to speech. component at the end.”
“It has to be a reasoning LLM typically to have the highest level of quality.”
Claim: A voice-agent pipeline typically needs a reasoning LLM to achieve the highest quality.
“Speed matters a lot to them.”
“They were previously using serving their LLMs on Cerebras. So they were using custom chips to get to the kind of speed that they need to deliver the best experience to their customers.”
“And then they switched over to our diffusion-based LLMs because they can essentially get the same speed as what you would get if you were to run an autoregressive model. on custom hardware.”
“If you have a diffusion-based LLM that it's built to be parallel, it's accelerating at the software level,”
“then you can get the same speed on NVIDIA GPUs, which means much more availability. I mean, GPUs are scarce, but there's more of that than custom chips and lower cost, higher quality.”
“And I think hardware is one way to accelerate things.”
“exactly. And especially they are complementary. That's the exciting piece is that to some extent, the gains that you get from the software, they are multiplicative. applicative with the gains you get from the hardware for”
“Yeah, it's a very valid point and something that is also like top of mind for us.”
“I think initially for us, for sure, like the moat is sort of like the IP, the trade secrets, like the ideas that we and our researchers have to build these models and make them better.”
“we've developed a product and we have real customers and we are getting feedback on on the models from from the real world is that by doing that we are also like developing components that are also very important to to deploy these models for example like a serving engine you know if you don't have the serving engine you can't really serve these models in production and so by forcing ourselves from the very beginning to go out”
“and deploy something end-to-end we're learning a lot about how to serve these models and how to build software that it's kind of like needed to run these models and that again becomes IP like even if you train the diffusion-based LLM if you don't have the serving engine if you don't have the VLLM equivalent to serve it you're still stuck and you still cannot use it.”
“and deploy something end-to-end we're learning a lot about how to serve these models and how to build software that it's kind of like needed to run these models and that again becomes IP like even if you train the diffusion-based LLM if you don't have the serving engine if you don't have the VLLM equivalent to serve it you're still stuck and you still cannot use it.”
“On the same line, like along the same lines, we are working with real customers and we're getting feedback on the models. We figure out what works, what doesn't. We collect data sometimes from them.”
“We figure out what works, what doesn't. We collect data sometimes from them. create evals based on what they're seeing and so that again becomes part of the of the technical mode because you know of course those things are a little bit harder to replicate”
“Yeah, it's a good question. And fundamentally, if you think about whenever you train a generative model, what you're doing is whether it's an autoregressive model or to some extent even a diffusion model is. you are trying to identify structure in the data by essentially building a compression scheme.”
“but whenever you train these models, you're effectively trying to identify common structure by trying to find an efficient way of compressing the data.”
Claim: Generative models seek common structure in data by learning an efficient compression scheme.
“And so the more you can compress the data, the more structure, the more patterns you're identifying, and that's how these models work,”
“which is the amazing thing. It's just like by predicting the next word. you are learning something about the structure of the data.”
Claim: Next-word prediction enables a model to learn aspects of the data's structure.
“And that's the same whether you're using a diffusion model or you're using an autoregressive model. Both methods are essentially trying to learn a compression scheme.”
Claim: Both diffusion and autoregressive models attempt to learn a compression scheme.
“And when I mentioned the original 2024 paper, when we showed that we are achieving parity with autoregressive models, the metric that we're using is basically perplexity, which is a notion of motion of how much structure have you identified in the data and so even though it might not seem obvious we were actually able to identify at the GPT-2 scale”
“motion of how much structure have you identified in the data and so even though it might not seem obvious we were actually able to identify at the GPT-2 scale the same amount of structure as an autoregressive model yeah”
“there is noise in everything”
Claim: All data contains noise.
“and so to the extent you know the numbers don't lie to the extent that you are able to drive different But if it flexes down, then it means that you can actually build like a compression scheme and that will get you that sort of like level of compression. And so the structure must be there and the model must have been able to uncover it.”
“And then it's more a question of an inductive bias, like, you know, is a transformer a better way of identifying those patterns or something else?”
“Is next token prediction the right modeling framework or is it more like. The noising and that's that's very much an empirical question that I think at the moment we don't have a tools even to understand”
“Yes, that's a key value proposition. And one of the things that they always look into is, you know, yeah, to what extent a lot of the value they provide is like the harness and making sure that the models indeed are doing the right thing.”
“And the interesting thing about a diffusion-based LLM is that we've built everything to be backwards compatible. So it's still like the API is the same. It's the same, it's still OpenAI compatible, text in, text out.”
“And it so happens that the models we've trained are good at following instructions, they're good at outputting, you know, if you're using JSONs, like structure outputs, they can handle all of those things.”
“And it was good enough, it was better in fact that the models they were using before.”
“And so they are still able to provide the kind of like level of service to their customers by using. thing mercury but”
Claim: Ermon says customers can maintain their level of service to end users by using Inception's model.
“it could be that that I think that's actually a very interesting point is that we know that diffusion models are typically easier to control compared to autoregressive models and the reason is that if you think about an autoregressive model you kind of like have to wait until you've generated the full object to know whether or not it satisfies let's say a constraint or whether or not whether it's aligned or whether or not whatever you know it's on brand whatever it is that the objective function that you care about maybe you're generating a molecule and you care about solubility and then and then you kind of like have to wait until you have the full object to be able to score it with some reward function but a diffusion model it's more course to find generation so from the very beginning you know kind of like is this object the kind of thing I want or not and you can steer this”
“clear the generation in the direction provided by an external reward function or some set of constraints and so there is a lot of evidence in the academic literature at least that diffusion models are easier to control and there are different ways of steering them that are just not possible without the regressor models so that would be a different interface for the model that maybe might not be even available for other regressor models i think that's something that”
“that's the thing we don't we don't know right and that's the that's”
Claim: The speaker does not know what capabilities Inception's models may have at scale beyond performance.
“the exciting it's emergent yes yes like right now the wedge speed oh we know they are much faster that was the initial bet because that was easier to test it was like easy to you know, to measure and it's obviously valuable,”
“But as we, that's why I find it so exciting is that as we learn more about how to train these models, you know, we don't know what we're going to find.”
“And there is a decent amount of evidence in the academic literature, for example, that diffusion-based models are more data efficient compared to autoregressive models.”
“you're learning by denoising. You start with an image, you add noise, and then you learn how to remove the noise.”
“And so it's effectively doing data augmentation in the sense that the same image is augmented by many noisy views.”
“And so they tend to be a little bit more data efficient.”
Claim: Diffusion models tend to be somewhat more data-efficient.
“And so if that, you know, holds up at scale and you believe that maybe we'll get into tasks, where data becomes the bottleneck, then it becomes more interesting,”
“That's why it's so exciting because things are changing and then this technology is so important and so valuable that having something differentiated, I think will create value.”
“group in an open router has this very nice way of kind of like looking at all the different use cases and you can kind of see you know the research and conversational and coding and software engineering and law processing law like they have like a nice taxonomy basically of tasks and I was doing some estimates and I think there is like Between 20 and 30 percent where latency is really, really important.”
Claim: The speaker estimates that latency is very important for 20–30 percent of workloads.
“And so at the very least, as a lower bound, I think it could be addressable by models that are within a given latency budget, they would give you the highest possible quality.”
“until one of the challenges that we had to build are a lot of things in-house and there is not a mature sort of like ecosystem of anything about the serving engine or like kernels like a lot of the things had to be developed in-house and”
“so there is not really anything open source or there are some open source models but they're not particularly good”
“good and so that makes it a little bit more difficult to you know deploy to get customers to try things they're not used to it so that's that's been one of the challenges”
“So we have to build our own stack for doing a... SFT if we're doing RLHF, doing RL, I mean that becomes IP to some extent so it's one of the reasons we decided not to open source everything was really to keep the IP a little bit closer to us and not opening it but then there are downsides like there is less less an opportunity for the community to contribute it's harder to adopt it's hard to do on-prem kind of like deployments and so on.”
“SFT if we're doing RLHF, doing RL, I mean that becomes IP to some extent so it's one of the reasons we decided not to open source everything was really to keep the IP a little bit closer to us and not opening it but then there are downsides like there is less less an opportunity for the community to contribute it's harder to adopt it's hard to do on-prem kind of like deployments and so on.”
“SFT if we're doing RLHF, doing RL, I mean that becomes IP to some extent so it's one of the reasons we decided not to open source everything was really to keep the IP a little bit closer to us and not opening it but then there are downsides like there is less less an opportunity for the community to contribute it's harder to adopt it's hard to do on-prem kind of like deployments and so on.”
“there are pros and cons with the two choices yeah”
“so we're not able to share much about the the training the size of the models or the flop flops or all of that it's kind of like a trade secret but we are continuing to push the frontier and inception is a great place to be if you want to be have an opportunity to shape the direction of the field like it's still a relatively small field there is a lot to be invented and so a lot of the people that decided to come to inception instead of joining one of the other labs is really that they want to have ownership”
“flops or all of that it's kind of like a trade secret but we are continuing to push the frontier and inception is a great place to be if you want to be have an opportunity to shape the direction of the field like it's still a relatively small field there is a lot to be invented and so a lot of the people that decided to come to inception instead of joining one of the other labs is really that they want to have ownership”
Claim: Inception is continuing to push the frontier of AI research and development.
“flops or all of that it's kind of like a trade secret but we are continuing to push the frontier and inception is a great place to be if you want to be have an opportunity to shape the direction of the field like it's still a relatively small field there is a lot to be invented and so a lot of the people that decided to come to inception instead of joining one of the other labs is really that they want to have ownership and they like to invent new things,”
“flops or all of that it's kind of like a trade secret but we are continuing to push the frontier and inception is a great place to be if you want to be have an opportunity to shape the direction of the field like it's still a relatively small field there is a lot to be invented and so a lot of the people that decided to come to inception instead of joining one of the other labs is really that they want to have ownership”
Claim: The field Inception works in is still relatively small, with many things left to be invented.
“they like to be in a space where there's more of a green field and more opportunities to try things that is less that it's known or available out there, it's a little bit more open-ended and so we tend to attract those kind of people.”
“oh yeah, yeah, I think we're not there yet.”
“Maybe we don't have access to the models that other folks have,”
Claim: The speaker may lack access to models available to other people.
“I mean, we use models a lot, of course, and it has accelerated. accelerated the speed at which we can iterate, try ideas, and we use models from Frontier Labs,”
Claim: Using models extensively has accelerated the speaker's team's iteration and experimentation.
“try ideas, and we use models from Frontier Labs,”
Claim: The speaker's team uses models from frontier AI labs.
“It has accelerated our development process a lot.”
Claim: Using models has substantially accelerated the speaker's team's development process.
“at least that right now i don't know what it's going to be in six months or a year but right now the the human ingenuity is still like super important and the ability to come up with the the right ideas and kind of like prune the space and kind of like identify directions that are more promising has been really important to us”
“at least that right now i don't know what it's going to be in six months or a year but right now the the human ingenuity is still like super important and the ability to come up with the the right ideas and kind of like prune the space and kind of like identify directions that are more promising has been really important to us”
“at least that right now i don't know what it's going to be in six months or a year but right now the the human ingenuity is still like super important and the ability to come up with the the right ideas and kind of like prune the space and kind of like identify directions that are more promising has been really important to us”
“It's a small team, but everyone is very talented and they work very hard and we have access to agents that are making us a lot more productive. And so I think the numbers are,”
“but everyone is very talented and they work very hard and we have access to agents that are making us a lot more productive. And so I think the numbers are, are sufficient to do to do a lot and in fact often the i feel like the the botanic is more compute than than than people uh but yeah the team is organized like there is a there is a product team effectively that is handling the platform and working with customers to to make them successful with our models and then so there is basically a team that it's serving the current”
“are sufficient to do to do a lot and in fact often the i feel like the the botanic is more compute than than than people uh but yeah the team is organized like there is a there is a product team effectively that is handling the platform and working with customers to to make them successful with our models and then so there is basically a team that it's serving the current current best version of the model and then there is a team that it's building the next version of the model and that includes training”
“are sufficient to do to do a lot and in fact often the i feel like the the botanic is more compute than than than people uh but yeah the team is organized like there is a there is a product team effectively that is handling the platform and working with customers to to make them successful with our models and then so there is basically a team that it's serving the current”
“current best version of the model and then there is a team that it's building the next version of the model and that includes training RL inference and so that's more research.”
“Like I was treated as co-advisor, so I worked on flash attention, for example. That's another thing that.”
Claim: FlashAttention originated in academia and later had a major impact in industry.
“that came out from academia that then eventually had a huge impact in industry right or another example is dpo that was another project started out as a rotation a project in my group uh it's an algorithm that is used to align you know llms and diffusion models and everywhere right and that's again something that that was developed entirely in academia”
“that came out from academia that then eventually had a huge impact in industry right or another example is dpo that was another project started out as a rotation a project in my group uh it's an algorithm that is used to align you know llms and diffusion models and everywhere right and that's again something that that was developed entirely in academia”
Claim: DPO is used as an alignment algorithm for large language models and diffusion models.
“And it was like based on a clever insight, like some interesting mathematical structure that you have in that problem that allows you to come up with a very different and more efficient way of post-training and aligning these models,”
“Lots of opportunities for finding new and better ways of solving important problems.”
“One of the nice things about academia is that it allows you to take these contrarian bets.”
Claim: Academia allows researchers to pursue contrarian research bets.
“I mean, there is the challenge that maybe we don't have enough resources and there is never enough resources and if we had more compute, we could be more efficient.”
Claim: The speaker believes academic researchers could work more efficiently if they had more compute.
“I mean, there is the challenge that maybe we don't have enough resources and there is never enough resources and if we had more compute,”
Claim: The speaker says academia may lack sufficient resources and that resources are never enough.
“you know, you have access to amazing students and everyone is kind of like trying to develop a new thing.”
“People are not scared about taking bets.”
Claim: The speaker says academic researchers are not afraid to pursue risky research bets.
“People are not scared about taking bets. And that's why academia has been so impactful, I think, even in the AI space.”
“A lot of the important ideas have roots or even were created in academia.”
Claim: The speaker says many important AI ideas originated in or have roots in academia.