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Aider

Open-source terminal pair programmer that edits your git repo with you.

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Aider is an open-source AI pair programmer that runs in your terminal and edits your actual git repository. You run it in a project directory, describe what you want, and it reads the relevant files, makes changes, and commits them directly to git. It supports Claude, GPT-4, Gemini, and other models via their APIs. Aider's strength is its git integration — every change is tracked, and you can see exactly what the AI touched with a standard git diff.

Since it's open-source, you pay only for the underlying model API — typically a few dollars per session. Most often compared to Claude Code (similar terminal philosophy, Anthropic-only) and Cursor (GUI-based, broader audience). Popular with developers who prefer command-line tools and want full transparency into what the AI is doing.

Made byPaul Gauthier (open source)
PricingFree (open source) · pay only for model API usage
Best forTerminal-based development, git-integrated editing, CLI-first developers

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