New Model Selection Feature

When mentioning @copilot in pull request comments to request code changes, users can now select which AI model to use. After typing the mention, a model picker appears in the bottom-left of the comment box, giving developers direct control over which model from Copilot's supported models list powers the request.

How It Works

The Copilot coding agent operates in a dedicated GitHub Actions environment where it can:

• Make changes to your codebase
• Build your project
• Run tests

This feature works with pull requests created by Copilot as well as those created by humans, giving all developers the ability to leverage the agent with their preferred model.

Current Limitations and Availability

The feature is currently limited to pull request comments on github.com only. Pull request review comments are not yet supported. GitHub plans to extend this functionality to GitHub Mobile and other comment types in the future.

Why This Matters

Model selection enables developers to optimize for different scenarios—choosing faster models for quick iterations or more capable models for complex coding tasks.