[BUG] Frequent mid-session 401 errors
Status Fixed / completed
Maintainer reply None cached
Activity 3 comments · opened Apr 16, 2026 · closed Apr 24, 2026
Preflight Checklist
- [x] I have searched existing issues and this hasn't been reported yet
- [x] This is a single bug report (please file separate reports for different bugs)
- [x] I am using the latest version of Claude Code
What's Wrong?
After recent update (within last week), getting frequent mid-session 401 errors in Claude Code in the desktop app (Windows 11).
Failed to authenticate. API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid authentication credentials"},"request_id":"req_011Ca7eMZaEWxrcefZLfmC8e"}
I have to close out of the app and restart it, which is disruptive to work flow. Prior to this I could remain logged in and active for days.
What Should Happen?
Claude Code should not log me out mid-session.
Error Messages/Logs
Steps to Reproduce
Use Claude Code in desktop (Windows 11), be inactive for any short period of time (30 minutes?) and come back to make a subsequent request.
Claude Model
Sonnet (default)
Is this a regression?
Yes, this worked in a previous version
Last Working Version
_No response_
Claude Code Version
1.2773.0 (884b37)
Platform
Anthropic API
Operating System
Windows
Terminal/Shell
VS Code integrated terminal
Additional Information
_No response_
3 Comments
Found 3 possible duplicate issues:
This issue will be automatically closed as a duplicate in 3 days.
🤖 Generated with Claude Code
This appears to have just started in the last week, did not exist in prior builds (i.e. the linked issues).
Although this is concerning that two of the linked issues are a month or more old and this is not resolved!
This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.