Bug or account access issue related to Codex model availability on my ChatGPT Plus plan

What version of the Codex App are you using (From “About Codex” dialog)?

Codex desktop app and Codex CLI on Linux

What subscription do you have?

ChatGPT Plus subscription

What platform is your computer?

Windows and Linux

What issue are you seeing?

I would like to report a bug or account access issue related to Codex model availability on my ChatGPT Plus plan.

{"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account."}}

Feedback ID: 019e8871-2c52-7db1-a18d-431e7d1afced

What steps can reproduce the bug?

Try to start Codex with the GPT-5.3-Codex model using ChatGPT Plus account.

What is the expected behavior?

I expect GPT-5.3-Codex to be available in Codex when using my ChatGPT Plus account, because the public Codex pricing page lists GPT-5.3-Codex as included with the Plus plan.

Additional information

_No response_