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macOS Desktop app returns HTTP 429 for every Chat message while Web and iOS work normally #38810
Description
What version of the Codex App are you using (From “About Codex” dialog)?
26.810.52044
What subscription do you have?
ChatGPT Plus
What platform is your computer?
Darwin 25.6.0 arm64 arm
What issue are you seeing?
The Chat surface in the new unified ChatGPT desktop app for macOS fails with HTTP 429 on every message.
Exact error:
Request failed with status 429
The problem occurs in both existing conversations and completely new chats, including when sending only:
test
The same OpenAI account works normally at the same time:
- in ChatGPT Web on the same Mac
- in the ChatGPT iOS app
The failure appears isolated to the macOS desktop client.
Feedback ID:
no-active-thread-01a0076b-c203-7601-8d65-80b6f65e0203
What steps can reproduce the bug?
Feedback ID: no-active-thread-01a0076b-c203-7601-8d65-80b6f65e0203
What is the expected behavior?
- Open the new ChatGPT desktop app on macOS.
- Select ChatGPT and use the normal Chat experience.
- Start a completely new chat.
- Send the message:
test
- The app immediately returns:
Request failed with status 429
- Repeat in another new chat - the same 429 occurs.
- Fully quit the app with Cmd+Q and reopen it - still fails.
- Restart the Mac - still fails.
- Log out of the desktop app and log back in - still fails.
- Switch the Mac from the normal Internet connection to an iPhone hotspot - still fails.
- Open ChatGPT Web on the SAME Mac, using the SAME account and SAME hotspot - Web works normally.
- Test the SAME account in the ChatGPT iOS app - iOS works normally.
- Uninstall and reinstall the ChatGPT desktop application - still fails.
- Check for updates - the app reports version 26.810.52044 is currently the newest available version.
The issue is therefore reproducible only in the macOS desktop client.
Session ID:
I do not currently have a session ID exposed by the app.
Feedback ID:
no-active-thread-01a0076b-c203-7601-8d65-80b6f65e0203
Context window:
The issue reproduces in a completely new chat with only the single word "test", so it is not dependent on a large conversation context.
Token/context usage:
Exact token usage is not exposed to me for the failed Chat request.
Additional observation:
The desktop sidebar shows "Usage 0% left", but normal Chat continues to work through Web and iOS using the same account.
Additional information
This is specifically a failure of Chat inside the new unified desktop app, not a Codex coding task.
Activity
github-actions commentedon Aug 15, 2026
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
Request failed with status 429while chatgpt.com works #38632Powered by Codex Action
wencapybara commentedon Aug 18, 2026
I’m experiencing what appears to be the same issue on macOS.
On August 17, 2026, at approximately 2:07 PM Taipei time (UTC+8), the Chat surface in the macOS desktop app again returned:
Request failed with status 429The failure occurred in a regular new Chat. This is intermittent rather than permanently affecting every message, but it has recurred multiple times.
Additional troubleshooting I have already tried:
The issue persisted despite those changes, so it does not appear limited to the original ChatGPT account, macOS user profile, or previous macOS version.
I have also reported this privately to OpenAI Support as Case 12751158, including a screen recording, timestamps, environment details, comparisons between affected and working surfaces, and screenshots from the latest recurrence. I am omitting account identifiers and private screenshots here.