October 2025 update makes the Claude Sonnet 4.5 and Claude Haiku 4.5 coding models available for use in the GitHub Copilot ...
Microsoft expanded model choice in VS Code with Bring Your Own Key (BYOK), enabling developers to connect models from any provider and manage them through a new extensible API.
At its core, VS Code is built on an open source project called Code OSS, published under the permissive MIT license.