claude-code - 💡(How to fix) Fix [BUG] 500 Internal server error [2 comments, 3 participants]

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anthropics/claude-code#48600Fetched 2026-04-16 06:55:51
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Error Message

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011Ca5jXAmt9PusF1sjbrdri"}

Code Example

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011Ca5jXAmt9PusF1sjbrdri"}
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Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011Ca5jXAmt9PusF1sjbrdri"} --version Claude Code v2.1.104

What Should Happen?

It should work?

Error Messages/Logs

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011Ca5jXAmt9PusF1sjbrdri"}

Steps to Reproduce

Use Claude code?

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

Claude Code v2.1.104

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

No response

extent analysis

TL;DR

The issue is likely related to a regression in the Claude Code API, and downgrading to a previous version or waiting for a patch may resolve the issue.

Guidance

  • Verify that the issue persists across different platforms and operating systems to rule out environment-specific causes.
  • Check the Anthropics API documentation for any known issues or updates related to the Opus model.
  • Attempt to reproduce the issue with a different Claude model to isolate the problem.
  • If possible, provide more details about the last working version to help identify the regression point.

Notes

The lack of information about the last working version and additional context makes it challenging to provide a more specific solution. The issue may be related to a recent update in the Claude Code API or the Opus model.

Recommendation

Apply workaround: Since the issue is reported as a regression, it's likely that a previous version of Claude Code worked as expected. If possible, try downgrading to a previous version until a patch is released for the current version.

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claude-code - 💡(How to fix) Fix [BUG] 500 Internal server error [2 comments, 3 participants]