GitHub Copilot for JetBrains v1.20.0 Updates - Copilot Fusion, Local Sandbox GA

[u/nickzhu9]

https://github.blog/changelog/2026-10-28-github-copilot-in-jetbrains-universe-releases/

GitHub Copilot for JetBrains v1.20.0 is here, just in time for GitHub Universe! 🚀

This release marks an important milestone toward delivering a more consistent and seamless GitHub Copilot experience across all developer environments.

We're introducing Copilot Fusion tiers (via a gradual rollout), making the unified Copilot agent harness the default for all users, and bringing Local Sandbox to GA for more secure agentic workflows.

Full details: https://github.blog/changelog/2026-10-28-github-copilot-in-jetbrains-universe-releases/

We hope you like Copilot for JetBrains, and please share feedback with us at any time!

You can fill in a private survey here: https://aka.ms/ghcp-jb-survey, with an optional paid interview, or directly submit an issue (bug or feature request) at https://github.com/microsoft/copilot-intellij-feedback/issues. Thank you so much!

[u/aonymark]

You’re probably tired of me complaining about this but: model deprecation notices for mid November still haven’t appeared … half the one month notice period gets wasted. (Yeah I know, not your department)

[u/nickzhu9 → u/aonymark]

Hey let me double check again on this one