VSCode extension model picker shows 1M context but actual limit is 200k

Bug Description

The VSCode extension model picker displays "Opus 4.6 (1M context)" as the selected model, but the actual context window being used is 200k tokens.

Steps to Reproduce

1. Open Claude Code in the VSCode extension
2. Open model settings — it shows "Opus 4.6 (1M context)"
3. Open the context usage panel — it shows 36.1k / 200.0k tokens (18%) with a 200k limit
4. Confirm via terminal CLI /model command — also reports 200k context

Expected Behavior

The model picker and the actual context limit should agree. Either:

• The 1M context should actually be active if it's shown as selected, or
• The model picker should not show 1M as an available option if it's not supported

Actual Behavior

• Model picker UI says: 1M context
• Context usage panel says: 200k limit
• Terminal /model command says: 200k context

Environment

• Claude Code VSCode extension
• Model: claude-opus-4-6
• Platform: Linux (Debian)

🤖 Generated with Claude Code