Yes
One huge thing, which OpenAI's announcement mentions as well, is that o1 is more _consistently_ strong
fpgaminer on Hacker News
In the thread “O1 isn't a chat model (and that's the point)”
Helped: Consistency, honesty, and pushing back on wrong premises.
Got in the way: High cost and lack of utility for o1-pro.
… But yeah, o1 has been a _huge_ leap in my experience. One huge thing, which OpenAI's announcement mentions as well, is that o1 is more _consistently_ strong. 4o is a great model, but sometimes you have to spin the wheel a few times. …