Grok 4.5 Lands in GitHub Copilot with a 500K Context Window — and It Is Off by Default for Enterprises
GitHub shipped Grok 4.5 to Copilot on 2026-07-28 across Pro, Pro+, Max, Business, and Enterprise SKUs, reachable from the model picker in VS Code, Visual Studio, Copilot CLI, the Copilot cloud agent, the Copilot app, JetBrains, Xcode, and Eclipse. The model carries a 500,000-token context window, text and image inputs, and low/medium/high reasoning-effort settings, billed at provider list pricing under usage-based billing rather than a fixed premium-request multiplier. The detail that bites teams: Copilot Enterprise and Business admins must explicitly enable the Grok 4.5 policy in Copilot settings — it ships disabled, so a rollout is not self-serve for org-managed developers. Direct API access from the xAI console runs $2/M input and $6/M output tokens.
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