Rubber Duck in GitHub Copilot CLI Now Supports More Models
Rubber Duck in GitHub Copilot CLI now works across model families. GPT sessions get Claude critics, Claude sessions get GPT-5.5 reviewers. Enable with /experimental on.
TL;DR
- Rubber Duck now works in GPT sessions with a Claude-powered critic agent
- Claude sessions get GPT-5.5 as the stronger reviewer model
- Enable with `/experimental on` in Copilot CLI
New
- Rubber Duck for GPT sessions — When using GPT as your orchestrator, Copilot dispatches a Claude-powered Rubber Duck agent to catch architectural issues, subtle bugs, and cross-file conflicts.
- Upgraded Claude session reviewers — Claude orchestrator sessions now pair with GPT-5.5 as the Rubber Duck model for stronger second opinions.
Run copilot and toggle /experimental on to try it. For more on how Rubber Duck combines model families, see the GitHub blog post.
Source: GitHub Changelog
