Aider

Aider is a free, open-source AI coding assistant that brings pair programming to your terminal.

What is Aider?

Aider is a command-line tool that lets you pair program with LLMs. It can edit multiple files, understand your codebase, and automatically commit changes to git.

Key Features

LLM Flexibility

Use any model:

• GPT-4 and GPT-4 Turbo
• Claude 3.5 Sonnet/Opus
• Local models via Ollama
• Any OpenAI-compatible API

Git Integration

Automatic version control:

• Commits each change
• Meaningful commit messages
• Easy to review and revert
• Branch awareness

Multi-File Editing

Work across your codebase:

• Add files to context
• Edit multiple files at once
• Understand dependencies
• Refactor across modules

Voice Mode

Code by speaking:

• Voice-to-code
• Hands-free programming
• Accessibility feature
• Natural conversation

Installation

pip install aider-chat
export OPENAI_API_KEY=your-key
aider

Pricing

Aider itself is free. You pay only for API usage:

• GPT-4: ~$0.03/1K tokens
• Claude: ~$0.015/1K tokens
• Local models: Free

Best Use Cases

Budget AI Coding

Use your own API keys with no subscription markup.

Open Source Projects

Free tool for open-source development.

Model Experimentation

Try different models to find what works best.

Privacy-Conscious Development

Run local models for sensitive codebases.

Aider vs Cursor

Tips for Effective Use

1. Start small - Add only relevant files to context
2. Be specific - Clear instructions get better results
3. Review commits - Check the auto-generated changes
4. Use /help - Explore available commands