Aider Review 2026
Open-source AI pair programming in your terminal that works with multiple LLMs to edit code in your local git repository.
Pros
- +Completely free and open source
- +Works with any LLM
- +Automatic git commits
- +Strong community support
Cons
- -Requires LLM API keys (paid separately)
- -Terminal-only interface
- -Steeper learning curve
Quick Take: Aider
Aider is a free, open-source AI pair programmer that runs in your terminal. It connects to LLMs like GPT-4 or Claude and makes real edits to your local files, with automatic git commits for every change.
What It Does
Pair programming via command-line chat — describe what you want and Aider edits your files directly. Supports GPT-4, Claude, and local models. Automatic git commits provide a full history of AI changes. Works with any programming language and any editor since it modifies files on disk.
Pricing
Aider itself is completely free and open-source. You pay only for the LLM API you connect (e.g., OpenAI API costs). Using with free local models via Ollama makes it entirely free.