I cant access gpt 5.3 codex with codex plus plan, codex can access my project
Resolved 💬 3 comments Opened Jun 2, 2026 by amoszcz Closed Jun 2, 2026
💡 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)?
26.527.31326
What subscription do you have?
plus
What platform is your computer?
windows
What issue are you seeing?
Last friday I bought plus subscription for codex:
https://chatgpt.com/pl-PL/codex/pricing/
Yesterday everything was working fine but today there are 2 problems:
- I cant use GPT-5.3-Codex model anymore. It looks like I can use only standard chatgpt models.
- Even standard models cant do anything in my project. They got error:
execution error: Io(Custom { kind: Other, error: "windows sandbox: spawn setup refresh" })
What steps can reproduce the bug?
Try to run prompt:can you access shell commands? Try to run "echo ok"
What is the expected behavior?
It should run terminal command successfully.
Additional information
_No response_
3 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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The 5.3-codex model has been retired for subscription holders to make room for newer models. It's still available through the API.
I’m seeing the same issue on Codex Desktop for Windows with ChatGPT Plus.
gpt-5.3-codex worked for me for two days, then stopped with:
"The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account."
After updating Codex Desktop, gpt-5.3-codex and gpt-5.2 disappeared from the model selector.
Feedback ID:
019e7e29-8154-7473-b08d-be28bdace1a7
Thanks for confirming that gpt-5.3-codex has been retired for subscription holders and remains available through the API.