Aider

A free, open-source terminal pair programmer with Git built in.

About

Aider is a free, open-source AI pair programmer that runs in the terminal. You add files to a chat, describe the work in plain language, and it proposes, applies and commits changes as readable Git commits. It is model-agnostic: bring your own API key from many providers, or run local models, and pay only the model provider.

Key features

• Terminal-based pair programming in your own editor and repo
• Model-agnostic: OpenAI, Anthropic, Google, DeepSeek, local models and more
• Automatic Git commits for every change, keeping history readable
• Multi-file edits with linting and test running in the loop
• Chat modes for code, architecture questions and asking about code
• Token usage and cost reporting for every session

Pricing

Free and open source; you pay only your chosen LLM provider's API costs

The tool itself has no subscription; typical API spend depends on model and usage, so check your provider's rates.

Best for

Terminal-comfortable developers who want full control over models and Git-tracked edits.

Limitations to know

AI-generated code can be wrong or insecure, so review and test everything before merging. Aider is terminal-only with no official IDE extension, setup needs comfort with API keys and the command line, and model bills are yours to manage.

What users think

Public sentiment could not be verified from accessible sources at the time of writing, so no praise or complaint themes are listed here rather than invented ones.

Our editorial score

Our editorial score: 8.2/10 — our own judgement, not an aggregate of user ratings. No full review is published for this tool yet — this page is its directory entry.

To try Aider, check the official site for current pricing and sign-up details.

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