[FEATURE] Using Opus 4.6 in Desktop

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I want to be able to use Opus 4.6 and 4.5 in Claude Code Desktop.

Proposed Solution

Add a "More models" menu to the model selector, like in Chat and Cowork.

Alternative Solutions

Implement the /model command.

Priority

High - Significant impact on productivity

Feature Category

Other

Use Case Example

_No response_

Additional Context

_No response_