Anthropic Claude Haiku 5.5 Is Now Generally Available in GitHub Copilot
GitHub has announced the general availability of Anthropic's lightweight Claude Haiku 5.5 model in GitHub Copilot, targeting high-volume tasks and quick edits.
Anthropic's latest lightweight model, Claude Haiku 5.5, is now generally available for all GitHub Copilot users. Designed specifically for speed and high-volume operations, this model excels at rapid code edits, subagent orchestration, and terminal-based automation tasks. Developers can now leverage the model directly within their Copilot-enabled IDEs and command-line interfaces.
Primary source
Open GitHub Changelog ↗This article summarizes the source. Check the original for full details and conditions.
Comparison
| Aspect | Before / Alternative | After / This |
|---|---|---|
| Primary Use Case | Deep reasoning and complex architecture design with larger models | High-speed, high-volume tasks, quick inline edits, and terminal operations |
| Model Efficiency | Higher latency and resource utilization | Lightweight execution tailored for rapid subagent orchestration |
| Copilot Integration | Limited to standard models like GPT-4o or Claude 3.5 Sonnet | Seamless switching to Claude Haiku 5.5 for lightweight tasks |
Action Checklist
- Update your GitHub Copilot extension to the latest version in your IDE Ensures the new model option is visible in the model selector dropdown
- Select Claude Haiku 5.5 in the Copilot Chat settings for rapid tasks Recommended for terminal commands and minor refactoring workflows
- Verify corporate access policies in the GitHub organization settings Administrators must enable third-party developer models if they are currently restricted
