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by Paul Gauthier / community · reviewed July 25, 2026
Open-source pair programming in your terminal. Git-native: every change lands as a commit.
Aider is a terminal tool that edits files in your repo and commits each change with a generated message, which makes its work trivially reviewable and revertible with normal git commands. It builds a repository map to give the model structure without dumping the whole codebase, and works against essentially any model provider you have a key for.
Provider-agnostic — Anthropic, OpenAI, Google, local models
People who want the agent's output to arrive as reviewable commits and want control over which model runs.
Reviewed July 25, 2026. Pricing changes often — check the official site before deciding.
Every tool here reads a project instruction file, and every one of them does better work when that file is accurate. The free Foundations track covers writing one; the Agent Operating Kit is the templates already written.