C:/Program Files/Git/model opus sets 200k context window instead of 1M on Max plan

Description

On a Max plan with Claude Code v2.1.101, using /model opus sets the context window to 200k tokens instead of 1M. Using /model with no arguments (selecting the default) correctly sets 1M.

Both resolve to claude-opus-4-6, but the opus alias doesn't enable the 1M context flag.

Steps to reproduce

1. Be on a Max plan with Claude Code v2.1.101
2. Run /model (no args) → selects "Opus 4.6 (1M context) (default)" → /context shows 1M tokens
3. Run /model opus → selects "Opus 4.6" → /context shows 200k tokens
4. Run /model (no args again) → back to 1M

Expected behavior

/model opus should resolve to the same 1M context window as the default Opus 4.6 selection on Max plans.

Additional context

• Having "model": "opus" in settings.json also causes every new session to start at 200k instead of 1M
• The opusplan alias also uses 200k (which may be expected since it falls back to Sonnet, but switching back to opus stays at 200k)
• Platform: Windows 11
• Claude Code version: 2.1.101