GitHub Copilot has started shipping xAI’s Grok 4.6, the company’s newest reasoning model, to developers who use the AI coding assistant. The rollout, announced on the GitHub Changelog, brings a model that xAI built for agentic coding and complex multi-step workflows into one of the most widely used AI developer tools.
The addition matters because Copilot users can now reach a different reasoning model alongside the OpenAI, Anthropic, and Google options already on the platform. For teams already standardizing on xAI, it removes the friction of switching tools to try Grok on real code. Context on how a rival model arrived in the same assistant is covered in our report on Google’s Gemini 3.7 Flash landing in GitHub Copilot.
GitHub says Grok 4.6 performed well in its own internal testing on terminal-based coding tasks inside Visual Studio Code and the Copilot CLI, and that it was especially strong on longer-horizon work needing sustained reasoning and tool use (GitHub Changelog). That characterization comes from the announcement itself rather than independent benchmarking, so developers should treat it as xAI’s own description of the model’s strengths until outside evaluations appear.
On cost, Grok 4.6 is billed at provider list pricing under Copilot’s usage-based billing, and GitHub points developers to its models-and-pricing documentation for per-token rates (GitHub Changelog). Because pricing is set per model and per token, heavier reasoning workloads will consume more credits than short completions, so the new option is not free to experiment with for paid users. Full per-token tables are listed in Models and pricing for GitHub Copilot.
Availability spans Copilot Pro, Pro+, Max, Business, and Enterprise plans. Users can pick the model in the model picker across Visual Studio Code, Visual Studio, Copilot CLI, the Copilot cloud agent, the Copilot app, JetBrains, Xcode, and Eclipse, though GitHub notes the rollout is gradual and some accounts may not see it immediately.
One administrative catch: for Copilot Business and Enterprise, the Grok 4.6 policy is off by default and must be switched on by a plan administrator in Copilot settings. Individual Pro, Pro+, and Max subscribers get it without an admin step. For a broader look at where Copilot’s enterprise and offline controls are heading, see our coverage of GitHub Enterprise 3.22 RC enabling offline Copilot CLI use.
