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Claude Sonnet 4.5 Supercharges GitHub Copilot: What Developers Need to Know

Discovering Next-Level AI Assistance in GitHub Copilot

Developers seeking smarter, faster coding experiences have reason to celebrate. Anthropic’s Claude Sonnet 4.5, the company’s most advanced AI model has arrived in public preview for GitHub Copilot. This release brings notable advancements in code generation, tool orchestration, and context-aware editing, allowing both beginners and experts to work more efficiently.

Broad Platform Availability

Claude Sonnet 4.5 is now accessible to users on Copilot Pro, Pro+, Business, and Enterprise subscriptions. The model can be selected via the Copilot Chat model picker on several major platforms:

  • Visual Studio Code: Engage with chat, ask, edit, and agent features for a dynamic coding environment.

  • GitHub.com: Access Copilot Chat directly within your browser for immediate support.

  • GitHub Mobile: Get the same advanced AI coding assistance on both iOS and Android devices.

Command-line aficionados aren’t left out; the Copilot CLI supports Claude Sonnet 4.5 through the new model picker. To get started, update your CLI using npm install -g @github/copilot and use the /model command to switch models on demand.

How to Enable and Manage Claude Sonnet 4.5

GitHub is introducing Claude Sonnet 4.5 gradually to ensure optimal stability. If it’s not available for your account yet, expect a rollout soon. For organizations, Enterprise and Business admins must activate the Claude Sonnet 4.5 policy within Copilot settings. Once enabled, team members can access the new model in both Copilot Chat and Copilot CLI environments.

Individual users including those on Free, Pro, and Pro+ plans can use their own Anthropic API key in Visual Studio Code. Simply go to Manage Models in the model picker, select Anthropic, and enter your API key to unlock Claude Sonnet 4.5’s capabilities.

What Makes Claude Sonnet 4.5 Stand Out?

  • Advanced Tool Orchestration: The model seamlessly coordinates multiple coding tools, improving workflow efficiency.

  • Enhanced Context Awareness: Better understanding of your codebase leads to smarter, more relevant suggestions and edits.

  • Domain-Specific Intelligence: Tailored support for specialized coding tasks across various tech domains.

According to GitHub’s early tests, developers are already seeing tangible improvements, especially when working on complex or large-scale projects that demand reliable, context-aware assistance.

Getting Started and Additional Resources

If you’re curious about all available AI models in Copilot, the official GitHub documentation provides comprehensive guidance. For feedback, troubleshooting, or sharing experiences, the GitHub community discussion forum is open for everyone to join and learn together.

Takeaway

The public preview of Claude Sonnet 4.5 in GitHub Copilot marks a significant leap forward for AI-powered coding. Whether you’re a solo developer or part of a large organization, these new capabilities are designed to refine your workflow and enhance productivity. Keep an eye out for ongoing updates as GitHub continues to evolve its suite of AI-driven development tools.

Source: GitHub Blog

Claude Sonnet 4.5 Supercharges GitHub Copilot: What Developers Need to Know
Joshua Berkowitz September 29, 2025
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