Windows Codex Desktop always uses retired gpt-5.3-codex model
Open 💬 2 comments Opened Jul 3, 2026 by rafexuefeng
💡 Likely answer: A maintainer (github-actions[bot], contributor)
responded on this thread — see the highlighted reply below.
What version of the Codex App are you using (From “About Codex” dialog)?
26.623.101652
What subscription do you have?
ChatGPT Plus
What platform is your computer?
"$([Environment]::OSVersion.VersionString) $([Environment]::Is64BitOperatingSystem)"
What issue are you seeing?
Feedback ID:
019f278e-e389-7f20-a39a-37f4f6db8b4b
Issue:
Every new conversation in the Windows Codex Desktop immediately fails with:
"The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account."
Environment:
- Codex Desktop 26.623.101652
- Windows 11
- ChatGPT Plus
- Logged in with ChatGPT account
What I tried:
- Reinstalled Codex
- Signed out and signed in again
- Started a brand-new conversation
- Tested with only "Hello"
- Verified ChatGPT Plus subscription
- Codex Cloud works correctly in the browser
Expected:
The desktop app should use the current supported model.
Actual:
The desktop app always attempts to use the retired gpt-5.3-codex model and every conversation immediately fails.
Feedback ID:
019f278e-e389-7f20-a39a-37f4f6db8b4b
What steps can reproduce the bug?
Feedback ID: 019f278e-e389-7f20-a39a-37f4f6db8b4b
What is the expected behavior?
Codex Cloud works correctly. Only the Windows Desktop app is affected.
Additional information
_No response_
2 Comments
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