Aider
What it is: AI pair programming in your terminal. Chat with GPT-4 or Claude to edit code files. Git-integrated, codebase-aware.
What It Does Best
Terminal native. No IDE needed. Works with any editor. Type requests, Aider edits files and commits changes.
Git workflow integration. Automatic commits with descriptive messages. Easy to review, rollback, or modify AI changes.
Multi-file edits. Add files to context. Aider understands relationships. Refactors across your entire codebase.
Key Features
Model flexibility: Works with GPT-4, Claude, and other LLMs
Git automation: Automatic commits with meaningful messages
Multi-file context: Reference and edit multiple files simultaneously
Repository map: AI understands project structure and relationships
Voice mode: Dictate coding requests hands-free
Pricing
Aider: Free and open-source
API costs: Bring your own OpenAI or Anthropic API key
GPT-4: ~$0.03-0.06 per 1K tokens
When to Use It
✅ Prefer terminal workflow over GUI
✅ Want precise control over AI edits
✅ Need multi-file refactoring with AI
✅ Use editor without good AI plugins (Vim, Emacs)
✅ Want git-integrated AI coding workflow
When NOT to Use It
❌ Want everything in one IDE
❌ Uncomfortable with command line
❌ Prefer inline suggestions while typing
❌ Need visual code editor features
❌ Don't want to manage API keys
Common Use Cases
Large refactors: Rename functions, restructure modules across files
Feature implementation: Build features with multiple file changes
Bug fixes: Trace and fix bugs spanning multiple files
Code migration: Port code between frameworks or languages
Documentation: Generate and update docs across codebase
Aider vs Alternatives
vs GitHub Copilot: Aider does multi-file edits, Copilot does inline completion
vs Cursor: Aider is terminal-based, Cursor is full IDE
vs ChatGPT: Aider directly edits files and commits, ChatGPT just generates code
Unique Strengths
Editor agnostic: Use any text editor you prefer
Git-first design: Every change is a reviewable commit
Codebase mapping: Understands file relationships automatically
Open source: Free tool, just pay for API usage
Bottom line: Power user's AI assistant. If you live in the terminal, Aider is your AI pair programmer. Git integration is killer feature.