Copilot Chat - 1

2025 (7)

December (1)

github: GPT-5.1-Codex-Max is now generally available in GitHub Copilot

GitHub

2025-12-17

GitHub has made the GPT-5.1-Codex-Max model generally available in GitHub Copilot for Copilot Enterprise, Copilot Business, Copilot Pro, and Copilot Pro+. The model can be used in GitHub Copilot Chat on github.com and GitHub Mobile.

November (2)

github: Auto model selection for Copilot in JetBrains IDEs, Xcode, and Eclipse in public preview

GitHub

2025-11-18

GitHub Copilot now offers an Auto model selection option in Copilot Chat for JetBrains IDEs, Xcode, and Eclipse. Selecting Auto lets Copilot choose the most appropriate model for you; the feature is available in public preview.

vscode: Open Source AI Editor: Second Milestone

Visual Studio Code

2025-11-06

Ghost text suggestions have been open sourced as part of the Copilot Chat extension — the second milestone toward making VS Code an open source AI editor.

October (3)

github: Anthropic’s Claude Sonnet 4.5 is now generally available in GitHub Copilot

GitHub

2025-10-13

Anthropic’s Claude Sonnet 4.5 is now generally available inside GitHub Copilot. The model can be accessed in GitHub Copilot Chat and is available to Copilot Enterprise, Copilot Business, Copilot Pro, and Copilot Pro+ customers.

github: Upcoming deprecation of Claude Sonnet 3.5

GitHub

2025-10-08

GitHub will deprecate Claude Sonnet 3.5 across all Copilot experiences (including Copilot Chat, inline edits, ask and agent modes, and code completions) on November 6, 2025. The change signals a move to newer, more capable models. The announcement appeared on The GitHub Blog.

github: Claude Sonnet 4.5 is now available in Visual Studio, JetBrains IDEs, Xcode, and Eclipse

GitHub

2025-10-02

Claude Sonnet 4.5 is available in public preview through GitHub Copilot Chat for users on Copilot Pro, Pro+, Business, and Enterprise plans, and can be used in Visual Studio, JetBrains IDEs, Xcode, and Eclipse.

September (1)

github: GitHub Copilot in VS Code August release (v1.104)

GitHub

2025-09-12

The August 2025 update (v1.104) for GitHub Copilot in Visual Studio Code delivers improvements aimed at greater flexibility, security, and productivity in AI-powered development workflows, and includes auto model selection in Copilot Chat.