Gemini 4 Hydrogen in GitHub Copilot

GitHub made Gemini 4 Hydrogen generally available in Copilot. It's Google's latest Flash model, and GitHub describes it as built for fast, efficient agentic coding, tool use, and multistep workflows. GitHub also says it follows instructions better than Gemini 3.8 Flash.

It's available on Copilot Pro, Pro+, Max, Business, and Enterprise. You can pick it from the model picker in VS Code, Visual Studio, Copilot CLI, the Copilot coding agent, the Copilot app, github.com, GitHub Mobile on iOS and Android, JetBrains IDEs, Xcode, and Eclipse. Rollout is gradual, so it may not show up for you right away.

Usage is billed at Google's list pricing under usage-based billing. On Business and Enterprise, admins control access through the model policy in Copilot settings. New models are on by default unless an admin has turned off the global default or disabled this model.