Aider is AI pair programming in your terminal

Aider lets you pair program with LLMs, to edit code in your local git repository. Start a new project or work with an existing code base. Aider works best with Claude 3.7 Sonnet, DeepSeek R1 & Chat V3, OpenAI o1, o3-mini & GPT-4o. Aider can connect to almost any LLM, including local models.

Getting started

If you already have python 3.8-3.13 installed, you can get started quickly like this:

python -m pip install aider-install
aider-install

# Change directory into your code base
cd /to/your/project

# Work with DeepSeek via DeepSeek's API
aider --model deepseek --api-key deepseek=your-key-goes-here

# Work with Claude 3.7 Sonnet via Anthropic's API
aider --model sonnet --api-key anthropic=your-key-goes-here

# Work with GPT-4o via OpenAI's API
aider --model gpt-4o --api-key openai=your-key-goes-here

# Work with Sonnet via OpenRouter's API
aider --model openrouter/anthropic/claude-3.7-sonnet --api-key openrouter=your-key-goes-here

# Work with DeepSeek via OpenRouter's API
aider --model openrouter/deepseek/deepseek-chat --api-key openrouter=your-key-goes-here

See the installation instructions and usage documentation for more details.

Features

• 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 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.
• Use aider inside your favorite editor or IDE.
• Aider works with most popular languages: python, javascript, typescript, php, html, css, and more...
• 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 or IDE while chatting with aider, and it will always use the latest version. Pair program with AI.
• Add images to the chat (GPT-4o, Claude 3.5 Sonnet, etc).
• Add URLs to the chat and aider will read their content.
• Code with your voice.
• Aider works best with Claude 3.7 Sonnet, DeepSeek V3, o1 & GPT-4o and can connect to almost any LLM.

Top tier performance

Aider has 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.

More info

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

Kind words from users

• 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
• Aider is amazing, coupled with Sonnet 3.5 it’s quite mind blowing. -- Josh Dingus
• Hands down, this is the best AI coding assistant tool so far. -- IndyDevDan
• [Aider] changed my daily coding workflows. It's mind-blowing how a single Python application can change your life. -- maledorak
• Best agent for actual dev work in existing codebases. -- Nick Dobos