Codex grew programmatic policies with no neural nets: max score on Breakout, and SOTA-level scores on MuJoCo.
Maybe heuristics were not too weak. Maybe they were just too expensive to maintain. Maybe it's the next paradigm.
GPT-5.5 Instant is starting to roll out in ChatGPT.
It’s a big upgrade, giving you smarter, clearer, and more personalized answers in a warmer, more natural tone.
And it's also more concise, which we heard you wanted. We think you'll love chatting with it.