Summary
On October 13, 2026, GitHub made Google's Gemini 4 Argon generally available in Copilot for Pro+, Max, Business, and Enterprise plans, across VS Code, Visual Studio, JetBrains, Xcode, Eclipse, Copilot CLI, the Copilot app, and the Copilot coding agent, for complex coding, agentic, and reasoning tasks.
What changed
Gemini 4 Argon became generally available in GitHub Copilot on Pro+, Max, Business, and Enterprise plans, across all major IDE surfaces, the CLI, and the coding agent, billed usage-based at provider list prices, with admin model-policy controls (new models enabled by default).
Why it matters
Adding Google's newest frontier model keeps Copilot multi-model and competitive on agentic and reasoning tasks, giving enterprises model choice while usage-based billing pushes more model-cost decisions onto admins.
Evidence excerpt
Gemini 4 Argon, Google's newest frontier model, is now generally available in GitHub Copilot.