alt Hacker NewsThis model is great at long horizon tasks, and Codex now has heartbeats, so it can keep checking on things. Give it your hardest problem that would take hours with verifiable constraints, you will see how good this is:)
*I work at OAI.
Replies
dandaka • yesterday at 7:23 PM
Could be a great feature, can't wait to test! Tired of other models (looking at you Opus) constantly stuck mid-task lately.
➕ show 2 replies
dannyw • yesterday at 7:47 PM
It's genuinely so great at long horizon tasks! GPT-5.5 solved many long-horizon frontier challenges, for the first time for an AI model we've tested, in our internal evals at Canva :) Congrats on the launch!
➕ show 1 reply
Sorry, what is "heartbeats", exactly?