AI Pair Programming in Your Terminal
Aider is the AI pair programmer that edits code in your local git repo via the terminal. Works with your editor, any LLM (Claude 3.5 Sonnet, DeepSeek R1, GPT-4o, local models), and many languages.
Aider enables pair programming with LLMs in the terminal, allowing developers to start new projects or build on existing codebases by conversing with AI models like Claude 3.7 Sonnet, DeepSeek, or GPT-4o. The tool maps the entire codebase to provide context, automatically commits changes with sensible messages, and integrates with git for easy undo and review.
Aider supports most popular programming languages (Python, JavaScript, Rust, Ruby, Go, C++, PHP, HTML, CSS, and 90+ others) with built-in linting and testing. The repository map feature helps the LLM understand code structure and relationships, enabling accurate multi-file edits and new code that respects existing abstractions.
Aider's --watch-files mode monitors code files for AI comments (# AI! or // AI?) added in any IDE or text editor, triggering code changes or answering questions without leaving the editor. Developers can also use /add to include files in the chat and continue work in the terminal when needed.
Aider automatically commits each change with descriptive messages following Conventional Commits, commits dirty files before applying edits to keep work separate, and provides /undo, /diff, and /git commands for full git history management. This ensures developers never lose work and can easily review what the AI changed.
Aider connects to cloud LLMs (OpenAI, Anthropic, DeepSeek, Google Gemini) and local models via Ollama or OpenAI-compatible APIs. Developers can choose their preferred provider, use free tier models from OpenRouter, or run entirely local models, avoiding vendor lock-in and controlling data privacy.