[Bug]: T3 code only provides 200k context window for Claude Opus 4.6, unlike the 1M from the CLI version

[benshawuk]

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

apps/web

Steps to reproduce

Type:
/context

Output:
Context Usage
Model: claude-opus-4-6
Tokens: 154.9k / 200k (77%)

CLI from a terminal:
Opus 4.6 (1M context) [66%]

Expected behavior

1M token context window

Actual behavior

200k context window

Impact

Minor bug or occasional failure

Version or commit

No response

Environment

No response

Logs or stack traces

Screenshots, recordings, or supporting files

No response

Workaround

No response

[hekmath]

This is not t3 code bug, it's agent sdk bug.