Aider

What is Aider?

Aider is an open-source AI pair programming tool that runs in the terminal, enabling developers to collaborate with LLMs to edit code in their local git repositories. It stands out for its git-native approach: every AI-generated change is automatically committed with a descriptive message, creating a clean history that makes it easy to review, accept, or revert AI contributions.

The tool supports a wide range of LLM providers including OpenAI, Anthropic, Google, and local models via Ollama. Aider's architecture-aware editing sends only relevant context to the model, keeping costs manageable while maintaining accuracy. It can work with multiple files simultaneously, understanding relationships between components to make coherent cross-file changes.

Aider has consistently ranked at the top of independent coding benchmarks, demonstrating strong performance in code generation, editing, and refactoring tasks. Its open-source nature means full transparency into how it works, an active community contributing improvements, and the flexibility to customize its behavior for specific workflows and team needs.

Key Features

• Open-source terminal-based AI pair programmer
• Automatic git commits for every AI change
• Multi-model support (OpenAI, Anthropic, local)
• Multi-file editing with architecture awareness
• Bring-your-own-key model (no markup)
• Repository map for intelligent context selection
• Voice coding via speech-to-text
• Linting and testing integration
• Image and URL context support
• Active open-source community

Pros & Cons

Pricing

Model: bring-your-key

Frequently Asked Questions

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