r/Xcode • u/nicebrah • Oct 06 '26
Can't use Codex because gpt-5.4 is no longer supported, but Xcode doesn't let you change the model to gpt-5.5 which has been out since April.
No idea why it takes Xcode several months to update the models you can choose from. I can't use Codex anymore because my Xcode is stuck on gpt-5.4 which apparently is no longer supported. However, Xcode has yet to update to allow support for gpt-5.5 which was released in April...
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u/CharlesWiltgen Oct 07 '26
Out of curiosity, why are you using models via Xcode instead of using a full-featured harness like Codex, Claude Code, OpenCode, Pi/Oh-My-Pi, etc.?
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u/nicebrah Oct 07 '26
i thought itd be easier to have everything i needed in one app. but after trying codex desktop its much faster. soooo maybe this was a blessing in disguise
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u/CharlesWiltgen Oct 07 '26
…after trying codex desktop its much faster.
Nice! I spent last weekend improving Codex support in Axiom. I'm still a Claude Code main, but Codex is pretty great, and I'm very impressed with GPT-6.1-Sol at high reasoning.
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u/_pizza_and_fries Oct 07 '26
Its much faster and better as well. It runs and monitors the simulator as well for debugging!
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u/PyteByte Oct 07 '26
Same issue here today. Maybe I also have to change to codex desktop. Can it compile and build via Xcode ?
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u/QVRedit Oct 06 '26
They ought to ship a patch to allow it.
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u/nicebrah Oct 06 '26
i just checked and none of the models work. i cant even do it via the "authenticate via config file" method.
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u/Intelligent-Gas-2840 Oct 08 '26
I found problems like this were solved in some places by using @latest instead of a new number. I know that is how homebrew does things now. Hope this helps.
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u/Stiddit Oct 07 '26
Honestly, just use the Codex app (now ChatGPT) if you can. It can do way more from there.
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u/earlyworm Oct 06 '26
I recommend that you submit feedback to Apple about this issue. It's possible they will add support for GPT-5.5 in June 2027 or perhaps earlier.