Gemini 4 Argon is now generally available in GitHub Copilot

GitHub announced on October 13, 2026 that Gemini 4 Argon is now generally available in GitHub Copilot. The GitHub Changelog calls it Google's newest frontier model and says it is designed for complex coding, agentic and reasoning tasks. It is available to Copilot Pro+, Max, Business and Enterprise users.

Release facts

What changed

• New model in the picker. Users can choose Gemini 4 Argon from the model picker. The changelog names GitHub Copilot coding agent as one of the places where it is offered.
• Vendor-reported coding results. GitHub says that in early testing, Gemini 4 Argon solved more tasks than previous Gemini models on every coding benchmark, and that its largest gains were in Copilot CLI. The cited excerpt does not name the benchmarks or give scores.
• Checks its own work. According to the changelog, the model checks its work thoroughly and tests edge cases before it finishes.
• Usage-based billing. The model is billed at provider list pricing under usage-based billing. GitHub points to its "Models and pricing for GitHub Copilot" page for details. The excerpt gives no rates.
• Admin controls. Copilot Business and Enterprise administrators can manage access through the model policy in Copilot settings.

Questions

Will Gemini 4 Argon be switched on automatically for my organization? It may be. The changelog says that under default model enablement, new models are enabled automatically unless an administrator has turned off the global default or explicitly disabled this model.

Why can't I see the model yet? GitHub says the rollout will be gradual and suggests checking back soon if the model doesn't show up yet.

What does it cost? The changelog says it is billed at provider list pricing under usage-based billing. For actual rates it refers readers to GitHub's models and pricing documentation. The cited sources don't list any figures.

For model details and future updates, see the Gemini 4 Argon hub. This launch is filed under coding agents, the same category as the Aider, Cline and OpenCode hubs.