/model command does not switch context window size (stays at 1M instead of standard 200k)

Description

When using the /model command to select Default Sonnet 4.6, the context window size shown in the status line does not switch from 1M to the standard 200k context window for Sonnet 4.6.

Steps to Reproduce

1. Open Claude Code with a model that uses 1M context (e.g., claude-sonnet-4-6 with extended context)
2. Run /model
3. Select "Default Sonnet 4.6" (the standard 200k context variant)
4. Observe the status line

Expected Behavior

Status line should show 200k context window after selecting Default Sonnet 4.6.

Actual Behavior

Status line continues to show 1M context window. The switch does not take effect even after selecting the default model multiple times (reproduced 3+ times in the same session).

Environment

• Platform: macOS (darwin 24.6.0)
• Shell: zsh