[MODEL] Opus 4.6 Hallucinations

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Other unexpected behavior

What You Asked Claude to Do

I asked it to start the dev server for the website im building

What Claude Actually Did

It failed to start the server and looped repeatedly until giving up

<img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/b9d49e85-c309-4e05-a1ba-546525795cc7" />
<img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/169163b8-6504-40ee-b297-e87cf90f8698" />
<img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/fa77d79c-b361-4e13-8cab-239e5e87fb2e" />

Expected Behavior

just started the dev server

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

Haven't tried to reproduce

Steps to Reproduce

_No response_

Claude Model

Opus

Relevant Conversation

Impact

Medium - Extra work to undo changes

Claude Code Version

v2.1.97

Platform

Anthropic API

Additional Context

_No response_