Repeated 500 Internal Server Errors on Claude Max plan (00/mo)

Bug Report

Plan: Claude Max ($200/month)
Platform: Windows 10 Pro, Claude Code CLI
Model: claude-opus-4-6
Date: 2026-02-25
Duration: 20+ minutes of continuous 500 errors

Description

Getting repeated API Error: 500 Internal Server Error responses during normal Claude Code usage. The errors happen in bursts — sometimes after tool calls (Bash), sometimes just trying to start a new session (claude --model claude-sonnet-4-6).

The errors persist for 20+ minutes, making the tool unusable.

Request IDs (for tracing)

• req_011CYV9R78drFbQzgf9UekMG
• req_011CYV9aYiWvdPFKLHnJ4Zmj
• req_011CYVAhoFgsPsw6dhRDJfGJ
• req_011CYVAkU3sYabHgudTazKwy

Error Format

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CYV..."}

Steps to Reproduce

1. Use Claude Code CLI normally (running bash commands, reading files)
2. After a tool call completes, the API returns 500 instead of generating a response
3. Also happens when launching a new session: claude --model claude-sonnet-4-6

Expected Behavior

The API should return responses reliably, especially on the $200/month Max plan.

Screenshot

!500 errors in burst

(3 consecutive 500 errors visible in terminal)