[BUG] VSCODE EXTENSION: switching to Sonnet model still gets you opus

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?

every time I try to select Sonnet using /model select from VSCode extension drop down. I select Sonnet but get Opus. depsite the dropdown saying Sonnet.

<img width="720" height="210" alt="Image" src="https://github.com/user-attachments/assets/80f3de5b-9929-4547-bc91-d3ed9c902e34" />

you can see that it just uses Opus either way... and worst of all it uses the 1m context window Opus for Sonnet... <img width="746" height="315" alt="Image" src="https://github.com/user-attachments/assets/d949b19e-fe05-478f-a202-4359ab978dd9" /> so it used up my whole 5-hr allotment in 10 mins when I thought I was being careful by setting it to Sonnet.

What Should Happen?

Sonnet should actually use Sonnet and I should get reimbursed.

Error Messages/Logs

Steps to Reproduce

Toggle is over .. see pictures included. /model select

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.76

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_