GPT-5.5 reaches SOTA results across key evals for agentic coding, computer use, tool use, advanced math, and cybersecurity: 82.7% on Terminal-Bench 2.0 and 78.7% on OSWorld-Verified. Rolling out in Codex and ChatGPT today. API coming soon! Full post:
@romainhuet
-
OpenAI announces GPT-5.5: smarter, faster AI model
By
–
Hello GPT-5.5!
— Romain Huet (@romainhuet) 23 avril 2026
Our best model yet is here. It’s smarter, faster, and gets more done.
I had the chance to capture first reactions from developers building with it: it writes better code, understands more complex tasks, and keeps going.
Can’t wait to see what you build with it! pic.twitter.com/k1w60WZeaDHello GPT-5.5! Our best model yet is here. It’s smarter, faster, and gets more done. I had the chance to capture first reactions from developers building with it: it writes better code, understands more complex tasks, and keeps going. Can’t wait to see what you build with it!
-
Team collaboration optimizing AI models in late night sessions
By
–
Late night Slack threads with the team when we’re all cooking with our models are the best threads!
-
OpenAI Confirms text-embedding-3-small Model Staying
By
–
This was a communication error on our side, sorry about this! Our text-embedding-3-small model is here to stay.
-
OpenAI clarifies text-embedding-3-small deprecation status
By
–
Sorry, this was a communication error on our side. We are not deprecating text-embedding-3-small.
-
Text-Embedding-3-Small Model Status Clarification from OpenAI
By
–
This was a communication mistake on our side, text-embedding-3-small is not being deprecated. Very sorry for the confusion!
-
OpenAI Confirms text-embedding-3-small Model Staying Available
By
–
Sorry, this wasn’t intentional, text-embedding-3-small isn’t going away!
-
OpenAI Clarifies text-embedding-3-small Not Being Deprecated
By
–
Thank you for flagging this, Jeff. This was a mistake: we are not deprecating text-embedding-3-small. We’re looking into where this came from now, and we’ll also email users to clarify. Sorry for the confusion!
-
GPT-Image-2 Achieves Record Lead in Arena Benchmarks
By
–
GPT-Image-2 is truly incredible. Amazing work by the team! This is the largest lead in Arena history.
-
Chronicle Makes Codex AI Code Generation More Autonomous
By
–
Want to see how Chronicle makes Codex more useful in practice? This piece from @dkundel shows how Codex needs less hand-holding and more often just figures things out!