Aider lets you pair program with large language models from the command line, whether you are starting a new project or changing an existing codebase. It builds a map of your repository so the model understands bigger projects, and it saves its work in git.

Features

• Many models: works best with leading cloud models from Anthropic, OpenAI and DeepSeek, and can connect to almost any LLM, including local ones.
• Git integration: changes are committed automatically with sensible messages, so you can diff or undo them with normal git tools.
• 100+ programming languages supported.
• Use it from your editor by adding comments to your code.
• Extra context: add images and web pages to the chat.
• Voice-to-code and copy and paste with a web chat interface.
• Linting and testing: runs your linters and tests after changes and can try to fix failures.

Aider is written in Python and released under the Apache-2.0 license. Documentation and model guides are available on the project website.