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Cannot use GPT-5.1-codex from latest alpha #6582
Description
What version of Codex is running?
v0.58.0-alpha.9
What subscription do you have?
Pro
Which model were you using?
gpt-5.1-codex-high
What platform is your computer?
macOS
What issue are you seeing?
unexpected status 400 Bad Request: {"detail":"The 'gpt-5.1-codex' model is not supported when using Codex with a ChatGPT account."}
What steps can reproduce the bug?
Uploaded thread: 019a7b74-8c9f-7f11-aaf4-d7b45ca71fbb
What is the expected behavior?
No response
Additional information
No response
Activity
guidedways commentedon Nov 13, 2025
I've tried logging out / logging back in. I've got a ChatGPT Pro account ($200/m plan)
guidedways commentedon Nov 13, 2025
@aibrahim-oai referencing #6569
Is this not supposed to work just yet?
gitanon112 commentedon Nov 13, 2025
same bruh im feening
user425846 commentedon Nov 13, 2025
This is the weirdest release yet. No benchmarks, no comparisons, no api access, no codex support, nothing.
ixel1 commentedon Nov 13, 2025
I get the feeling and impression that GPT 5.1 was released earlier than originally planned, so now some teams such as Codex are catching up. Looking at the activity there are quite a few changes in implementing GPT 5.1 support, including prompt changes, so I guess they won't open up access until they officially release support for the new models.
guidedways commentedon Nov 13, 2025
@ixel1 that might be the case, but thought I'd bring this up still. Was hoping it works in alpha 9 but does not.
rust-v0.58.0-alpha.9...main
LordMooseFace commentedon Nov 13, 2025
I was actually using codex just fine like an hour ago. I upgraded to the latest version and started to get this error. Downgrading doesn't work now either. Forcing the model back to 5.0-codex doesn't work either.
You CAN use the 5.1 model without the -codex.
Iydah commentedon Nov 13, 2025
@LordMooseFace Yeah, I also observed this as well, although I did notice. I'm not too sure if the /review command purposely forces a different model, but using /review on the codex works, but then messages after it do not. And yes, the normal 5.1 model works fine.
insilications commentedon Nov 13, 2025
https://x.com/embirico/status/1988801666142134497
You will be able to use it later this week.
LordMooseFace commentedon Nov 13, 2025
I think it might be a bigger problem than that, if you force gpt-5.0-codex you also get
■ unexpected status 400 Bad Request: {"detail":"The 'gpt-5.0-codex' model is not supported when using Codex with a
ChatGPT account."}
itboffins commentedon Nov 13, 2025
See the same thing here but interestingly OpenAI is experiencing some issues so may be related? https://status.openai.com/
LordMooseFace commentedon Nov 13, 2025
I went back to (v0.57.0 - sudo npm install -g @openai/codex@0.57.0)
wiped out the codex config [ -d ~/.codex ] && rm -rf ~/.codex
startup, login again and it's all working again now on -codex models on gpt 5 not 5.1
insilications commentedon Nov 13, 2025
The correct model ID for gpt-5 codex is
gpt-5-codex, notgpt-5.0-codexguidedways commentedon Nov 13, 2025
Seems to be working now in 0.58