GitHub Copilot is GitHub's AI coding assistant and agent. In the editor it explains code, completes lines and makes multi-file edits in agent mode, and its cloud agent takes assigned tasks, works on them in the background and opens changes for review.

Key features:

Agent mode for proposing and validating multi-file edits in the IDE.
A cloud agent that plans and executes assigned tasks in the background.
Third-party agents, including Claude Code and OpenAI Codex.
Automated pull request code review.
Copilot Spaces for shared knowledge from docs and repositories.
A desktop app for tracking and merging agent work across repositories.

Copilot works in GitHub, the CLI, chat apps and IDEs such as VS Code, with audit logs and MCP server allow lists for governance. The Free plan includes 2,000 completions a month and the CLI. Pro is $10/month, Pro+ $39/month and Max $100/month; Business is $19 per user per month with pooled credits, IP indemnity and access controls, and Enterprise is available for org-wide rollouts.