Aider
AI pair programming in the terminal with a repository map, automatic git commits and support for almost any LLM.
- License
- Apache-2.0
- Platforms
- Windows, macOS, Linux, CLI
- Own API keys
- Yes
- Checked
- 2026-09-24
Aider works with OpenAI-compatible APIs. Grab a free key and a model from the catalog: for coding · for agents · providers and base URLs
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FAQ
Is Aider free?
Free and open source; connect any LLM via API key, including OpenRouter free models, DeepSeek or local models through Ollama.
Does Aider work with free models?
Yes. It supports your own keys and OpenAI-compatible APIs, so you can plug in free models from OpenRouter, Groq, NVIDIA Build, or a local Ollama.
What license does Aider use?
Apache-2.0. The source code is open.