Amazing to see @nvidia go all-in on Codex! We’ve started going deep with a few companies to roll out Codex and GPT-5.5. Seeing it work this quickly at this scale is exciting. Let’s fire up those Blackwells!
@romainhuet
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Developers Share GPT-5.5 Building Experiences in Coffee Chats
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Thanks so much @clairevo
, @willkoh_kc
, and @AaronFriel for joining me for these quick coffee chats and sharing what building with GPT-5.5 felt like. Loved seeing what you made with it! -
GPT-5.5 Live Launch Announced by OpenAI
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GPT-5.5 Live with Every https://
x.com/i/broadcasts/1
AxRnaLmZYPxl
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Codex and GPT-5.5: Combining Models for Shipping Work
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Codex + GPT-5.5 is an incredible combo.
— Romain Huet (@romainhuet) 23 avril 2026
A great model needs a great space to work. Codex gives GPT-5.5 the context, tools, artifacts, browser, and review loop to turn reasoning into work you can ship. https://t.co/9sAnYFBDdlCodex + GPT-5.5 is an incredible combo. A great model needs a great space to work. Codex gives GPT-5.5 the context, tools, artifacts, browser, and review loop to turn reasoning into work you can ship.
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GPT-5.5 Achieves State-of-the-Art Agentic Coding and Tool Use Results
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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:
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OpenAI announces GPT-5.5: smarter, faster AI model
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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!
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Team collaboration optimizing AI models in late night sessions
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Late night Slack threads with the team when we’re all cooking with our models are the best threads!
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OpenAI Confirms text-embedding-3-small Model Staying
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This was a communication error on our side, sorry about this! Our text-embedding-3-small model is here to stay.
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OpenAI clarifies text-embedding-3-small deprecation status
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Sorry, this was a communication error on our side. We are not deprecating text-embedding-3-small.
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Text-Embedding-3-Small Model Status Clarification from OpenAI
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This was a communication mistake on our side, text-embedding-3-small is not being deprecated. Very sorry for the confusion!