GitHub Copilot is the AI coding assistant developed by GitHub, a Microsoft subsidiary. It was among the first AI pair programmers to reach broad commercial availability, and it is now deeply integrated into Visual Studio Code, JetBrains IDEs, Visual Studio, Neovim, and GitHub.com itself.
Key capabilities
Inline autocomplete — The flagship feature: single-line and multi-line code suggestions appear in-editor as the developer types. Accepts or dismisses with Tab / Escape.
Copilot Chat — A side-panel chat interface available in VS Code and JetBrains. Supports /explain, /fix, /tests, /docs slash commands and workspace-aware questions.
GitHub.com integration — Copilot Chat is available inside GitHub pull request review, issue descriptions, and the repository search UI.
Copilot Workspace — A more autonomous mode that takes a GitHub issue as input and proposes a full implementation plan and diff across multiple files, which the developer then edits and approves before committing.
Multi-model support — As of 2024, Copilot allows users to choose between OpenAI GPT-4o, Anthropic Claude, and Google Gemini for chat responses.
Autonomy level
Level 2 (assisted): Copilot proposes; the developer accepts or rejects each suggestion. Copilot Workspace raises autonomy toward level 3 within a controlled review flow.
Strengths
- Best-in-class IDE integration (VS Code, JetBrains)
- GitHub-native for pull request and issue workflows
- Largest user base and longest track record of any AI coding tool
Limitations
- Closed source
- Autocomplete quality varies by language and codebase size
- Workspace feature (more autonomous) is still maturing