Aider lets you pair program with LLMs, to edit code in your local git repository. Start a new project or work with an existing git repo. Aider can connect to almost any LLM. and works best with GPT-4o, Claude 3.5 Sonnet, Claude 3 Opus and DeepSeek Coder V2.

You can get started quickly like this:

$ pip install aider-chat

# Change directory into a git repo
$ cd /to/your/git/repo

# Work with GPT-4o on your repo
$ export OPENAI_API_KEY=your-key-goes-here
$ aider 

# Or, work with Anthropic's models
$ export ANTHROPIC_API_KEY=your-key-goes-here

# Claude 3 Opus
$ aider --opus

# Claude 3.5 Sonnet
$ aider --sonnet

See the installation instructions and other documentation for more details.

• Run aider with the files you want to edit: aider <file1> <file2> ...
• Ask for changes:
  • Add new features or test cases.
  • Describe a bug.
  • Paste in an error message or or GitHub issue URL.
  • Refactor code.
  • Update docs.
• Aider will edit your files to complete your request.
• Aider automatically git commits changes with a sensible commit message.
• Aider works with most popular languages: python, javascript, typescript, php, html, css, and more...
• Aider works best with GPT-4o and Claude 3 Opus and can connect to almost any LLM.
• Aider can edit multiple files at once for complex requests.
• Aider uses a map of your entire git repo, which helps it work well in larger codebases.
• Edit files in your editor while chatting with aider, and it will always use the latest version. Pair program with AI.
• Add images to the chat (GPT-4o, GPT-4 Turbo, etc).
• Add URLs to the chat and aider will read their content.
• Code with your voice.

Aider has the one of the top scores on SWE Bench. SWE Bench is a challenging software engineering benchmark where aider solved real GitHub issues from popular open source projects like django, scikitlearn, matplotlib, etc.

• Documentation
• Installation
• Usage
• Tutorial videos
• Connecting to LLMs
• Configuration
• Troubleshooting
• LLM Leaderboards
• GitHub
• Discord
• Blog

• The best free open source AI coding assistant. -- IndyDevDan
• The best AI coding assistant so far. -- Matthew Berman
• Aider ... has easily quadrupled my coding productivity. -- SOLAR_FIELDS
• It's a cool workflow... Aider's ergonomics are perfect for me. -- qup
• It's really like having your senior developer live right in your Git repo - truly amazing! -- rappster
• What an amazing tool. It's incredible. -- valyagolev
• Aider is such an astounding thing! -- cgrothaus
• It was WAY faster than I would be getting off the ground and making the first few working versions. -- Daniel Feldman
• THANK YOU for Aider! It really feels like a glimpse into the future of coding. -- derwiki
• It's just amazing. It is freeing me to do things I felt were out my comfort zone before. -- Dougie
• This project is stellar. -- funkytaco
• Amazing project, definitely the best AI coding assistant I've used. -- joshuavial
• I absolutely love using Aider ... It makes software development feel so much lighter as an experience. -- principalideal0
• I have been recovering from multiple shoulder surgeries ... and have used aider extensively. It has allowed me to continue productivity. -- codeninja
• I am an aider addict. I'm getting so much more work done, but in less time. -- dandandan
• After wasting $100 on tokens trying to find something better, I'm back to Aider. It blows everything else out of the water hands down, there's no competition whatsoever. -- SystemSculpt
• Hands down, this is the best AI coding assistant tool so far. -- IndyDevDan
• Best agent for actual dev work in existing codebases. -- Nick Dobos