[BUG] `/model` returns uses old version of models (Sonnet 4, Opus 4.1 and no Haiku)

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?

In v2.0.30 we have old model list, which doesn't include Sonnet 4.5 and Haiku 4.5 and by default use Opus 4.1 with Sonnet 4.

<img width="1062" height="195" alt="Image" src="https://github.com/user-attachments/assets/91a2b94c-4a71-4206-9c58-735173d46259" />

What Should Happen?

We should have choice between Sonnet 4.5, Haiku 4.5 and Opus 4.1

Error Messages/Logs

Steps to Reproduce

Open claude and call /model. Select Recommended, write some prompts and ask for /context - you will see that Opus 4.1 has been used.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.0.28

Claude Code Version

2.0.30

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_