[BUG] switch model itself

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?

When useing Claude Code, it switch to Opus 4.6 by itself

What Should Happen?

It should not switch the model. I want to decide, which model should be used.

Error Messages/Logs

none

Steps to Reproduce

Set Sonnet as model. Switch from one Chat to another an back again. Then Opus is selected

Claude Model

None

Is this a regression?

I don't know

Last Working Version

Version 1.1.2321 (495628)

Claude Code Version

1.1.2321

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_