What changed
The model appears in the model picker in VS Code, Visual Studio, Copilot CLI, the coding agent, the Copilot app, github.com, GitHub Mobile, JetBrains, Xcode and Eclipse. It’s billed at the provider’s list price under usage-based billing. Business and Enterprise orgs get it switched on automatically unless an admin has turned off default enablement or blocked the model.
Who it affects
Copilot Pro+, Max, Business and Enterprise users.
What to do
Admins should check the model policy in Copilot settings. Users can pick it in the model picker as the rollout reaches them.
Source: https://github.blog/changelog/2026-09-22-claude-opus-5-5-is-now-available-in-github-copilot/