Claude Haiku 5.5 Now Available in GitHub Copilot
GitHub CopilotGitHub made Claude Haiku 5.5, Anthropic's newest lightweight model, generally available in GitHub Copilot. The model targets fast, high-volume work such as subagents, quick edits and terminal tasks. In early testing, GitHub reported it matched Claude Sonnet 5 on many coding tasks while using significantly fewer tokens and steps.
Key Takeaways
- Claude Haiku 5.5 is generally available in GitHub Copilot as Anthropic's newest lightweight model.
- It is built for subagents, quick edits and terminal tasks, where speed and low cost matter most.
- GitHub reports it matched Claude Sonnet 5 on many coding tasks in early testing.
- It used significantly fewer tokens and steps than larger models in that testing, which lowers cost for repeated agent calls.
- The model is in the picker across ten surfaces, from VS Code and JetBrains to Xcode, Eclipse and GitHub Mobile.
- It is billed at provider list pricing under usage-based billing, and Business and Enterprise admins control access through the model policy.
A Fast, Lightweight Model for High-Volume Work
GitHub made Claude Haiku 5.5, Anthropic's newest lightweight model, generally available in GitHub Copilot. The model is positioned for fast, high-volume work, including subagents, quick edits and terminal tasks, where responsiveness and low cost matter more than maximum reasoning depth.
According to GitHub's early testing, Claude Haiku 5.5 matched Claude Sonnet 5 on many coding tasks while using significantly fewer tokens and steps. That makes it a natural choice for the many small, repeated calls that agentic workflows generate, such as delegating subtasks to helper agents.
Where It Is Available
Claude Haiku 5.5 appears in the model picker on Visual Studio Code, Visual Studio, Copilot CLI, the GitHub Copilot cloud agent, the GitHub Copilot app, github.com, GitHub Mobile on iOS and Android, JetBrains IDEs, Xcode and Eclipse. It is offered on the Copilot Pro, Pro+, Max, Business and Enterprise plans. The rollout is gradual, so the model may not yet appear for every user.
Billing and Administration
The model is billed at provider list pricing under GitHub Copilot's usage-based billing, with details in the Models and pricing documentation. For Copilot Business and Enterprise, administrators manage access through the model policy in Copilot settings. Under default model enablement, new models are turned on automatically unless an administrator has disabled the global default or this specific model.