Yes
It's the first model I've seen that can do that
hodgehog11 on Hacker News
In the thread “Will It Mythos?”, replying to this comment
Helped: Fable solved hard open-ended research tasks Codex failed.
Got in the way: Codex stuck in naive loops; Fable failed one simple task.
… I gave it multiple very hard open-ended tasks (effectively math tasks) involving research code and it crushed them. It's the first model I've seen that can do that. The current Codex will never produce the type of code Fable gave me no matter how many times I run the same problem at it, because it won't stop trying naive rubbish. …