openai / openai/codex

[Bug] Selected model is at capacity error on Windows 10

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#44,565 3 comments 0 reactions 0 assignees View on GitHub

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bug connectivity windows-os
Dominant language
Rust
Stars
125k
Forks
19.4k
PR merge metrics
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Description

I am repeatedly getting "Selected model is at capacity. Please try a different model." error.

The connection also drops with these errors:

  • stream disconnected before completion: websocket closed by server before response.completed
  • IO error: 远程主机强迫关闭了一个现有的连接。 (os error 10054)

This makes Codex completely unusable. It happens on Windows 10 build 19045. I am using model gpt-5.6-sol. It seems to be a server-side capacity issue, not my account or network.

Screenshot attached.

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Contributor guide

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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 reported model-capacity and websocket disconnect errors on Windows 10, using the issue's model and OS details. Trace whether the failure originates in the Codex client or the server-side capacity path; done means identifying an actionable cause and confirming the errors no longer make the client unusable.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
backend, networking
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
35/100

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