GitHub Copilot is the AI pair programmer from GitHub (Microsoft), available in every major editor: VS Code, Visual Studio, JetBrains IDEs, Xcode, Neovim, Eclipse and github.com itself. It covers inline completions, agent mode, code review and the Copilot CLI.
Since June 2026, agent features are metered through GitHub AI Credits. The free tier offers 2,000 completions per month, Pro at $10/month adds unlimited completions plus $15 in credits, and Pro+ ($39) and Max ($100) unlock premium models like Opus with larger credit pools.