codex - 💡(How to fix) Fix Codex App on Windows WSL responding very slow compared to CLI [1 comments, 2 participants]

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openai/codex#20967Fetched 2026-05-05 05:55:17
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What version of the Codex App are you using (From “About Codex” dialog)?

26.429.30905

What subscription do you have?

Pro $100

What platform is your computer?

Host: Microsoft Windows NT 10.0.26200.0 x64 WSL: Linux 6.6.87.2-microsoft-standard-WSL2 x86_64 x86_64 ; Ubuntu 24.04.4 LTS

What issue are you seeing?

Sending the same message with gpt-5.5 low reasoning fast mode, in the app it takes 30-60 seconds to respond (stuck on Thinking...), in the CLI it is almost immediate. I am on Windows 11 and WSL on Ubuntu 24.04.4 LTS.

What steps can reproduce the bug?

Send the same message in the App or the CLI on Windows 11 and WSL on Ubuntu 24.04.4 LTS.

What is the expected behavior?

No response

Additional information

No response

extent analysis

TL;DR

The issue may be related to the Codex App's performance on Windows 11 with WSL, and using the CLI instead could be a temporary workaround.

Guidance

  • Investigate the difference in performance between the Codex App and the CLI on Windows 11 with WSL to identify potential bottlenecks.
  • Try running the Codex App on a native Linux environment (without WSL) to see if the issue persists.
  • Compare the system resources (e.g., CPU, memory, network) used by the Codex App and the CLI to determine if resource allocation is a contributing factor.
  • Consider testing with a different version of the Codex App or WSL to isolate the issue.

Notes

The issue may be specific to the combination of Windows 11, WSL, and the Codex App version 26.429.30905, and further investigation is needed to determine the root cause.

Recommendation

Apply workaround: Use the CLI instead of the Codex App for now, as it provides an almost immediate response.

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codex - 💡(How to fix) Fix Codex App on Windows WSL responding very slow compared to CLI [1 comments, 2 participants]