GitHub Copilot Update: Claude Sonnet 4.5 Added in 2026

GitHub has officially announced the general availability of Anthropic’s Claude Sonnet 4.5 across GitHub Copilot.

This major GitHub Copilot update gives developers access to one of the most advanced AI models for coding, designed to improve accuracy, flexibility, and efficiency across popular development platforms.

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Claude Sonnet 4.5 Now in GitHub Copilot

The Claude Sonnet 4.5 model is now available for all Copilot Enterprise, Business, Pro, and Pro+ users. Developers can use the model in Copilot Chat on multiple platforms, including:

• GitHub.com
• GitHub Mobile
• Visual Studio Code
• Visual Studio
• JetBrains IDEs
• Xcode
• Eclipse

Key Highlights

• Access the model through chat model picker in agent, ask, or edit modes.
• Enterprise and Business admins must enable the Claude Sonnet 4.5 policy in Copilot settings.
• Individual users can select the model manually in supported IDEs.
• Works seamlessly with Copilot coding agent for all plans.

This rollout ensures consistency across GitHub’s ecosystem, letting developers interact with the same AI model whether coding locally or in the cloud.

Also read about: GitHub Copilot Embedding Model 2025 Enhances Code Search

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Features and Developer Benefits

Claude Sonnet 4.5 offers major upgrades in reasoning, performance, and coding context understanding. It’s designed to help developers write cleaner and faster code while reducing repetitive work.

Major Improvements

• Cross-platform access across all major IDEs
• Deep context understanding for complex workflows
• Enhanced editing and debugging via Copilot Chat
• Smart policy controls for business administrators
• Real-time support through the new Copilot Chat agent

Developers using Copilot CLI and Chat can now generate, review, and correct code with improved accuracy. The model’s contextual memory allows longer conversations without losing focus, delivering more natural code assistance.

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Summary

This GitHub Copilot update marks a significant step toward smarter software development.

By integrating Anthropic’s Claude Sonnet 4.5, GitHub strengthens its collaboration with AI models built for professional coding environments.

For developers, this means better speed, precision, and integration — all inside the tools they use every day.

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