AI Pair Programming in Your Terminal

Aider lets you pair program with LLMs to start a new project or build on your existing codebase.

<a href="https://github.com/Aider-AI/aider/stargazers"><img alt="GitHub Stars" title="Total number of GitHub stars the Aider project has received" src="https://img.shields.io/github/stars/Aider-AI/aider?style=flat-square&logo=github&color=f1c40f&labelColor=555555"/></a> <a href="https://pypi.org/project/aider-chat/"><img alt="PyPI Downloads" title="Total number of installations via pip from PyPI" src="https://img.shields.io/badge/📦%20Installs-6.8M-2ecc71?style=flat-square&labelColor=555555"/></a> <img alt="Tokens per week" title="Number of tokens processed weekly by Aider users" src="https://img.shields.io/badge/📈%20Tokens%2Fweek-15B-3498db?style=flat-square&labelColor=555555"/> <a href="https://openrouter.ai/#options-menu"><img alt="OpenRouter Ranking" title="Aider's ranking among applications on the OpenRouter platform" src="https://img.shields.io/badge/🏆%20OpenRouter-Top%2020-9b59b6?style=flat-square&labelColor=555555"/></a> <a href="https://aider.chat/HISTORY.html"><img alt="Singularity" title="Percentage of the new code in Aider's last release written by Aider itself" src="https://img.shields.io/badge/🔄%20Singularity-88%25-e74c3c?style=flat-square&labelColor=555555"/></a> </p>

Features

Cloud and local LLMs

<a href="https://aider.chat/docs/llms.html"><img src="https://aider.chat/assets/icons/brain.svg" width="32" height="32" align="left" valign="middle" style="margin-right:10px"></a> Aider works best with Claude 3.7 Sonnet, DeepSeek R1 & Chat V3, OpenAI o1, o3-mini & GPT-4o, but can connect to almost any LLM, including local models.

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Maps your codebase

<a href="https://aider.chat/docs/repomap.html"><img src="https://aider.chat/assets/icons/map-outline.svg" width="32" height="32" align="left" valign="middle" style="margin-right:10px"></a> Aider makes a map of your entire codebase, which helps it work well in larger projects.

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100+ code languages

<a href="https://aider.chat/docs/languages.html"><img src="https://aider.chat/assets/icons/code-tags.svg" width="32" height="32" align="left" valign="middle" style="margin-right:10px"></a> Aider works with most popular programming languages: python, javascript, rust, ruby, go, cpp, php, html, css, and dozens more.

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Git integration

<a href="https://aider.chat/docs/git.html"><img src="https://aider.chat/assets/icons/source-branch.svg" width="32" height="32" align="left" valign="middle" style="margin-right:10px"></a> Aider automatically commits changes with sensible commit messages. Use familiar git tools to easily diff, manage and undo AI changes.

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Use in your IDE

<a href="https://aider.chat/docs/usage/watch.html"><img src="https://aider.chat/assets/icons/monitor.svg" width="32" height="32" align="left" valign="middle" style="margin-right:10px"></a> Use aider from within your favorite IDE or editor. Ask for changes by adding comments to your code and aider will get to work.

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Images & web pages

<a href="https://aider.chat/docs/usage/images-urls.html"><img src="https://aider.chat/assets/icons/image-multiple.svg" width="32" height="32" align="left" valign="middle" style="margin-right:10px"></a> Add images and web pages to the chat to provide visual context, screenshots, reference docs, etc.

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Voice-to-code

<a href="https://aider.chat/docs/usage/voice.html"><img src="https://aider.chat/assets/icons/microphone.svg" width="32" height="32" align="left" valign="middle" style="margin-right:10px"></a> Speak with aider about your code! Request new features, test cases or bug fixes using your voice and let aider implement the changes.

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Linting & testing

<a href="https://aider.chat/docs/usage/lint-test.html"><img src="https://aider.chat/assets/icons/check-all.svg" width="32" height="32" align="left" valign="middle" style="margin-right:10px"></a> Automatically lint and test your code every time aider makes changes. Aider can fix problems detected by your linters and test suites.

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Copy/paste to web chat

<a href="https://aider.chat/docs/usage/copypaste.html"><img src="https://aider.chat/assets/icons/content-copy.svg" width="32" height="32" align="left" valign="middle" style="margin-right:10px"></a> Work with any LLM via its web chat interface. Aider streamlines copy/pasting code context and edits back and forth with a browser.

Getting Started

python -m pip install aider-install
aider-install

# Change directory into your codebase
cd /to/your/project

# DeepSeek
aider --model deepseek --api-key deepseek=<key>

# Claude 3.7 Sonnet
aider --model sonnet --api-key anthropic=<key>

# o3-mini
aider --model o3-mini --api-key openai=<key>

See the installation instructions and usage documentation for more details.

More Information

Documentation

• Installation Guide
• Usage Guide
• Tutorial Videos
• Connecting to LLMs
• Configuration Options
• Troubleshooting
• FAQ

Community & Resources

• LLM Leaderboards
• GitHub Repository
• Discord Community
• Release notes
• Blog

Kind Words From Users

• "My life has changed... Aider... It's going to rock your world." — Eric S. Raymond on X
• "The best free open source AI coding assistant." — IndyDevDan on YouTube
• "The best AI coding assistant so far." — Matthew Berman on YouTube
• "Aider ... has easily quadrupled my coding productivity." — SOLAR_FIELDS on Hacker News
• "It's a cool workflow... Aider's ergonomics are perfect for me." — qup on Hacker News
• "It's really like having your senior developer live right in your Git repo - truly amazing!" — rappster on GitHub
• "What an amazing tool. It's incredible." — valyagolev on GitHub
• "Aider is such an astounding thing!" — cgrothaus on GitHub
• "It was WAY faster than I would be getting off the ground and making the first few working versions." — Daniel Feldman on X
• "THANK YOU for Aider! It really feels like a glimpse into the future of coding." — derwiki on Hacker News
• "It's just amazing. It is freeing me to do things I felt were out my comfort zone before." — Dougie on Discord
• "This project is stellar." — funkytaco on GitHub
• "Amazing project, definitely the best AI coding assistant I've used." — joshuavial on GitHub
• "I absolutely love using Aider ... It makes software development feel so much lighter as an experience." — principalideal0 on Discord
• "I have been recovering from ... surgeries ... aider ... has allowed me to continue productivity." — codeninja on Reddit
• "I am an aider addict. I'm getting so much more work done, but in less time." — dandandan on Discord
• "Aider... blows everything else out of the water hands down, there's no competition whatsoever." — SystemSculpt on Discord
• "Aider is amazing, coupled with Sonnet 3.5 it's quite mind blowing." — Josh Dingus on Discord
• "Hands down, this is the best AI coding assistant tool so far." — IndyDevDan on YouTube
• "[Aider] changed my daily coding workflows. It's mind-blowing how ...(it)... can change your life." — maledorak on Discord
• "Best agent for actual dev work in existing codebases." — Nick Dobos on X
• "One of my favorite pieces of software. Blazing trails on new paradigms!" — Chris Wall on X
• "Aider has been revolutionary for me and my work." — Starry Hope on X
• "Try aider! One of the best ways to vibe code." — Chris Wall on X
• "Freaking love Aider." — hztar on Hacker News
• "Aider is hands down the best. And it's free and opensource." — AriyaSavakaLurker on Reddit
• "Aider is also my best friend." — jzn21 on Reddit
• "Try Aider, it's worth it." — jorgejhms on Reddit
• "I like aider :)" — Chenwei Cui on X
• "Aider is the precision tool of LLM code gen... Minimal, thoughtful and capable of surgical changes ... while keeping the developer in control." — Reilly Sweetland on X
• "Cannot believe aider vibe coded a 650 LOC feature across service and cli today in 1 shot." - autopoietist on Discord
• "Oh no the secret is out! Yes, Aider is the best coding tool around. I highly, highly recommend it to anyone." — Joshua D Vander Hook on X
• "thanks to aider, i have started and finished three personal projects within the last two days" — joseph stalzyn on X
• "Been using aider as my daily driver for over a year ... I absolutely love the tool, like beyond words." — koleok on Discord
• "Aider ... is the tool to benchmark against." — BeetleB on Hacker News
• "aider is really cool" — kache on X