[Claude Desktop App - Code / Windows / v2.1.183] GUI model selector does not show 1M, Opus, and Sonnet model variants

Description

Several model variants are not visible in the GUI model selector in the Code feature of the Claude desktop app (Windows), even though they are accessible via the /model CLI command.

Affected Models

• claude-sonnet-4-6[1m]
• claude-opus-4-8 (and other Opus variants)
• Some Sonnet variants

Steps to Reproduce

1. Open the Claude desktop app and navigate to the Code feature
2. Open the model selection UI
3. Observe that the above models are not listed

Expected Behavior

All models accessible via /model CLI command should also appear in the GUI model selector.

Actual Behavior

The GUI shows a limited list that excludes 1M-context variants and some other models.

Workaround

Use the CLI command directly:

/model sonnet[1m]

Environment

• Platform: Windows 11
• App: Claude Desktop App (Code feature)
• Version: v2.1.183