[BUG] Claude Code serves Opus 4.6 despite selecting Opus 4.7

[lydianweb]

Preflight Checklist

• I have searched existing issues and this hasn't been reported yet
• This is a single bug report (please file separate reports for different bugs)
• I am using the latest version of Claude Code

What's Wrong?

Summary
Claude Code consistently serves claude-opus-4-6[1m][1m] regardless of selecting Opus 4.7 in the model picker. Opus 4.7 is accessible via claude.ai web interface on the same account.

Environment
OS: Windows 11 Home 10.0.26200
IDEs tested: Cursor, VS Code (same behavior in both)
Claude Code extension version: 2.1.111
Account: Pro/Max plan (has Opus 4.7 access on claude.ai)

Steps to reproduce
Open Claude Code extension in VS Code or Cursor
Select Opus 4.7 from the model picker
Start a new session
Run /context
Model reported is claude-opus-4-6[1m][1m], not 4.7

What I've tried
Restarting the IDE (both Cursor and VS Code)
Starting fresh sessions
Removing CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING env var from settings

Expected behavior
/context should report Opus 4.7 when selected.

Actual behavior
Opus 4.7 appears in the model picker but the API always serves Opus 4.6.

What Should Happen?

Expected behavior
/context should report Opus 4.7 when selected.

Actual behavior
Opus 4.7 appears in the model picker but the API always serves Opus 4.6.

Error Messages/Logs

Steps to Reproduce

Steps to reproduce
Open Claude Code extension in VS Code or Cursor
Select Opus 4.7 from the model picker
Start a new session
Run /context
Model reported is claude-opus-4-6[1m][1m], not 4.7

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

No response

Claude Code Version

2.1.111

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Cursor

Additional Information

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] Claude Model Missmatch #45978
2. [BUG] VSCode extension: Default model picker shows Opus 4.6 but sets claude-sonnet-4-6 #35789
3. [Bug] VSCode extension ignores model selection and reverts to Opus despite Sonnet configuration #43330

This issue will be automatically closed as a duplicate in 3 days.

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🤖 Generated with Claude Code

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.