[Bug] API Error 500 - Internal Server Error persists despite update (req_011CX)

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?

Bug Description

Claude Code consistently returns API Error 500 on every prompt.
The issue persists after updating to the latest version and re-logging in.

Error:
API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CXmPcEpXBmaaanPD69AaM"}

What I've tried

• Updated Claude Code to latest version (npm update -g @anthropic-ai/claude-code)
• Logged out and logged back in
• Tried different models
• Checked status.anthropic.com - shows operational

Environment Info

• Platform: darwin (macOS)
• Terminal: default
• Region: Northern Cyprus (KKTC)

Additional Note

I'm a paying subscriber and have been unable to use Claude Code for several hours due to this issue. It would be appreciated if Anthropic could consider compensation (e.g., extended usage or credits) for the downtime experienced, especially when the status page does not reflect the actual service disruption.

What Should Happen?

Additional Note

I'm a paying subscriber and have been unable to use Claude Code for several hours due to this issue. It would be appreciated if Anthropic could consider compensation (e.g., extended usage or credits) for the downtime experienced, especially when the status page does not reflect the actual service disruption.

Error Messages/Logs

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CXmPLuns8EbWhBACbettt"}

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CXmPcEpXBmaaanPD69AaM"}

Steps to Reproduce

1. Open terminal
2. Run claude to start Claude Code
3. Type any prompt (e.g., "hello")
4. Receive API Error 500 immediately
5. Tried multiple times over several hours - same result every time
6. Updated Claude Code via npm update -g @anthropic-ai/claude-code - no fix
7. Logged out and back in (claude /logout → claude /login) - no fix
8. Issue is 100% reproducible on every prompt

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.15

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_