Gemini 4 Hydrogen Is Now Generally Available in GitHub Copilot

Gemini 4 Hydrogen, Google’s latest Flash model, is now generally available in GitHub Copilot. GitHub designed the model for fast, efficient agentic coding, tool use, and multistep workflows. It offers improved instruction following over Gemini 3.8 Flash.

Access covers Copilot Pro, Pro+, Max, Business, and Enterprise users. Developers can select the model in the model picker in Visual Studio Code, Visual Studio, Copilot CLI, the GitHub Copilot coding agent, the GitHub Copilot app, github.com, GitHub Mobile on iOS and Android, JetBrains IDEs, Xcode, Eclipse, and the Copilot SDK. GitHub says the rollout will be gradual, so users who do not see the model yet should check back soon.

The model is billed at provider list pricing under usage-based billing. Readers should review the Models and pricing page for GitHub Copilot for details.

Why it matters

Model choice shapes how well an assistant handles long, multistep coding tasks, so a faster Flash-class option gives teams another tool for agent work. Usage-based billing means heavier agentic use will show up directly in costs. Administrators on Business and Enterprise plans also control whether the model is available to their developers.

What to do

Check the model picker in your editor or on github.com once the rollout reaches your account. Before rolling the model out across a team, confirm current rates on GitHub’s Models and pricing page. Business and Enterprise administrators should review the model policy in Copilot settings, since new models are enabled by default unless the global default has been turned off.