Qu'est-ce que Aider ?
Aider is an open-source, terminal-based AI pair programmer: you run it inside your project's git repository, describe a change in natural language, and it edits the relevant files directly, then commits the change with a descriptive commit message. There's no IDE plugin or web app — it works entirely from the command line, layered on top of your existing editor and git workflow.
It's popular specifically with developers who want a lightweight, model-agnostic tool rather than being locked into one vendor's IDE or subscription. Aider works with models from Anthropic, OpenAI, Google, DeepSeek, and local models via Ollama, among others — you bring your own API key and pay the model provider directly rather than paying Aider a subscription fee.
Aider itself is completely free and open source. Your actual cost is whatever API usage you generate with your chosen model provider, which can range from a few dollars to $50+/month depending on how heavily you use it and which model you pick.
Fonctionnalités clés de Aider
- Terminal-native workflow: Runs entirely from the command line — no IDE plugin or separate app required.
- Direct file editing: Edits your actual codebase files based on natural-language instructions.
- Automatic git commits: Commits each change with an auto-generated descriptive commit message.
- Model-agnostic: Works with models from Anthropic, OpenAI, Google, DeepSeek, and local Ollama models.
Cas d'usage de Aider
- Make a multi-file code change from a natural-language description in the terminal
- Pair-program with an AI directly inside an existing git workflow
- Use a self-hosted or local model for AI-assisted coding via Ollama
- Automate repetitive refactors across a codebase