[BUG] Conflicting model identification (Sonnet or Opus? both are listed)

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?

Which is it? Shows both models on startup - Sonnet 4.6 in the header and then "Welcome to Opus 4.6"

<img width="436" height="365" alt="Image" src="https://github.com/user-attachments/assets/f1300323-72b6-4352-a1a7-aae52078b32f" />

What Should Happen?

Should show one clear current model selection.

Error Messages/Logs

Steps to Reproduce

Start claude code

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.50

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_