You can ask Copilot coding agent to make changes in any pull request by mentioning @copilot. This works in pull requests created by Copilot and in pull requests created by humans.

Copilot works in the background in its own development environment, powered by GitHub Actions, where it can make changes, build your project, and run tests.

Now you can pick a model when mentioning @copilot. After adding the mention, a model picker will appear in the bottom-left of the comment box, allowing you to select a model from Copilot coding agent’s supported models.

At the moment, this functionality is limited to github.com and only works for pull request comments, not pull request review comments. We’ll be bringing this to GitHub Mobile and other kinds of comments soon.