Aider

Aider is a veteran open-source AI pair programmer that runs in your terminal, edits code across your existing git repo, and auto-commits each change with sensible messages. It works with 100+ languages and lets you bring your own model (Claude, GPT, local models and more). It's a free, scriptable favorite among developers who live in the command line.

Key features

• Terminal-based AI pair programming
• Automatic git commits
• Bring-your-own-model
• Whole-repo editing with maps
• 100+ languages

Pros & cons

Aider pricing

Aider uses a open source pricing model, with paid plans from Free (you pay only your chosen model's API usage). AI pricing changes often, so confirm current plans on the provider's site. Browse all open source AI tools we track.

Who should use Aider?

Aider is best suited for developers who want a free, model-agnostic CLI coding assistant. It earns its place for free and open-source. The main trade-off: terminal-first (no rich GUI).

Comparing options? See our best ai coding & dev tools guide, or browse every ai coding & dev tool tracked on Benchquill.

Key concepts behind ai coding & dev tools: AI agent · Function / tool calling · Context window · Open weights · MCP (Model Context Protocol).

Aider FAQ

Is Aider free?

Aider is open source. Pricing starts at Free (you pay only your chosen model's API usage).

What is Aider best for?

Aider is best for developers who want a free, model-agnostic CLI coding assistant. Its standout strength: free and open-source.

What are the best Aider alternatives?

The closest alternatives are Claude Code and Cursor. Claude Code is anthropic's terminal-native agentic coding tool, while Cursor is the AI-first code editor built for pair-programming with agents.