If you have GitHub Copilot Max, you actually do have full access to premium models like Claude. If they aren't showing up in your model selector, it is usually due to one of three quick reasons:

1. You are using "Agent Mode" (Claude Code)
   If you are trying to delegate multi-step tasks to third-party agents, Claude models operate under a specific option. Make sure you have Claude Code or the Anthropic agent selected in your IDE rather than the standard chat dropdown.

2. Extension is Outdated or Needs a Re-login
   Sometimes your IDE extension doesn't register a plan upgrade automatically.

Completely Sign Out of GitHub inside your IDE (VS Code, JetBrains, etc.).

Update your GitHub Copilot exte…