GPT-5.5 is now in the API as well!
@romainhuet
-
Codex App Coming to Linux, CLI and IDE Extension Available Now
By
–
No ETA just yet, but we’d love to ship the Codex app to Linux soon! In the meantime, you can already use Codex via the CLI or IDE extension. And if you want to be first to know when the app is ready, sign up here:
-
GPT-5.5 Integrated into Devin AI Coding Agent
By
–
Love to hear this! Thanks Walden, and congrats on bringing GPT-5.5 to Devin!
-
GPT-5.5 Now Available in OpenAI API for Developers
By
–
GPT-5.5 is now available in the OpenAI API! The big thing for developers is that it’s not just smarter, it can get complex tasks done with fewer tokens and fewer retries. Ask Codex to migrate your Responses API integration to GPT-5.5!
-
GPT-5.5 Improves Codex Efficiency With Fewer Tokens
By
–
GPT-5.5 uses significantly fewer tokens for the same Codex tasks. In general, you should expect better capability with fewer tokens vs GPT-5.4, not an increase!
-
OpenAI and NVIDIA Partner to Roll Out Codex and GPT-5.5 at Scale
By
–
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!
-
Developers Share GPT-5.5 Building Experiences in Coffee Chats
By
–
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
By
–
GPT-5.5 Live with Every https://
x.com/i/broadcasts/1
AxRnaLmZYPxl
… -
Codex and GPT-5.5: Combining Models for Shipping Work
By
–
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.
-
GPT-5.5 Achieves State-of-the-Art Agentic Coding and Tool Use Results
By
–
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: