openai / openai/codex

unexpected status 404 Not Found: Unknown error, url: https://chatgpt.com/backend-api/codex/responses, cf-ray: a355ab31cf6eb7a5-ABJ

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app bug connectivity
Dominant language
Rust
Stars
125k
Forks
19.4k
PR merge metrics
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Description

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

Version 26.901.20858

What subscription do you have?

Plus

What platform is your computer?

https://chatgpt.com/backend-api/codex/responses, cf-ray: a355ab31cf6eb7a5-ABJ

What issue are you seeing?

I keep encountering the "unexpected status 404 Not Found: Unknown error, https://chatgpt.com/backend-api/codex/responses, cf-ray: a355ab31cf6eb7a5-ABJ" despite typing continue or changing chat.

What steps can reproduce the bug?

Every time I initiate a conversation. I can't even update the chagpt classic app nor codex.

What is the expected behavior?

No response

Additional information

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the failure when initiating a conversation against https://chatgpt.com/backend-api/codex/responses, using the reported Codex App version 26.901.20858 and Plus subscription details. Done would require identifying why the endpoint returns 404 and confirming that new conversations no longer fail.

Written by the indexing model from the issue text.

Assessment

Domain
api, backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
25/100

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