Model Selection in Pull Requests

When mentioning @copilot in pull request comments, developers can now pick which AI model powers the coding agent before it executes. After adding the mention, a model picker appears in the bottom-left of the comment box, allowing selection from Copilot's supported models.

How It Works

The Copilot coding agent operates in its own development environment powered by GitHub Actions, where it can make changes, build projects, and run tests. This model selection capability gives developers more control over which AI model handles their request—useful for optimizing between speed, cost, and reasoning capabilities depending on the task.

Current Limitations and Future Expansion

This functionality is currently limited to github.com and only works for pull request comments, not pull request review comments. GitHub plans to expand model selection to GitHub Mobile and other types of comments in the future.

What Developers Need to Know

• Select a model immediately after mentioning @copilot in PR comments
• Works for both human-created and Copilot-generated pull requests
• Available now on github.com
• Additional platforms and comment types coming soon