Ryan Greenblatt said that GPT-4 had been released a little over three years earlier and that a model he called “Mythos 5” existed at the time of the conversation, possibly alongside a somewhat better model inside Anthropic.

“So, you know, right now it's like three years ago or a little over three years ago, there was GPT-4 that had come out.”

“And right now, of course, we have like, you know, Mythos 5 or whatever,”

“and maybe a somewhat better model than Anthropic has internally.”