The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account.

[lrnzfrr]

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

Version 26.601.21317 • Released Jun 2, 2026

What subscription do you have?

Plus

What platform is your computer?

Darwin 25.5.0 arm64 arm

What issue are you seeing?

i have a plus account but from today codex app answer me:
The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account.

What steps can reproduce the bug?

Feedback ID: 019cd1a6-d3f0-71c3-9c09-5b95ae5cd8ba

What is the expected behavior?

No response

Additional information

No response

[github-actions]

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• Codex models are no longer supported with a ChatGPT account #26053
• Bug or account access issue related to Codex model availability on my ChatGPT Plus plan #25885
• The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account. #25871
• gpt-5.3-codex stopped working with ChatGPT account and disappeared after update #25830
• ChatGPT Plus account cannot use Codex extension: gpt-5.3-codex is not supported #25781

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[MalekSmida]

I got the same error today and after checking available models i noticed that GPT-5.3-Codex is no longer available

Online they mentioned

GPT-5.2 and GPT-5.3-Codex are no longer available in Codex through a ChatGPT subscription.

Announcement link: https://community.openai.com/t/gpt-5-2-and-gpt-5-3-codex-have-been-sunset-in-codex-with-chatgpt-subscriptions/1382273/13

This issue is a duplicate of #25839

[etraut-openai]

The gpt-5.3-codex model has been retired. Please use one of the newer models.