What is Aider?
Aider is an open-source terminal-based AI coding assistant that works with your local Git repository. It understands your codebase context, makes changes directly to files, and creates Git commits automatically. Think of it as pair programming with an AI. Aider works with multiple AI models including GPT-4, Claude, and open-source models via ollama. The "architect" mode plans changes before implementing them, and the repository map feature helps the AI understand large codebases efficiently. For developers who want Claude Code-like capabilities with full control and customization, Aider is excellent. It's free to use (you provide your own API key), highly configurable, and has an active community contributing features and improvements.
Pros
- Open source and free
- Works with multiple AI models
- Automatic Git commits
- Repository map for context
- Active development
- Highly configurable
Cons
- Requires API key and costs
- Terminal-only interface
- Setup more complex than hosted