The speaker says there are rumors that some other training runs have been unsuccessful.

“gpt 4.5 which like famously people at opening i thought was a big of a bit of a bust i think there are some rumors that there are a bunch of other”

“training runs that people have done that were a bit of a bust and part of it is that i think there's just a bunch of details and actually getting that right and so um it makes sense to just do more of the work at smaller scale and just eat the fact that you're taking a hit on final performance in order to like be able to like quickly iterate and you know train more models faster and therefore better learn and also better”