Aider

Aider is a terminal-based AI coding assistant for developers who want to work with an AI pair programmer directly in their codebase. The documentation positions it as “AI pair programming in your terminal,” and it is aimed at people editing, reviewing, and iterating on software projects.

You get started by installing aider with Python, then configuring an API key for a supported model provider and running it inside your project directory. The docs show command-line usage with xAI models, and also mention an “in your IDE” mode with --watch-files for monitoring repository changes.

Aider looks more like a coding copilot than a fully autonomous agent. The crawled docs clearly show it taking action on code in your repo and watching files for changes, but they do not show it independently completing broader software tasks without user direction.

Model support is provider-based rather than tied to one vendor: the docs explicitly show xAI/Grok models, but the overall provider list is not fully visible here. Pricing was not publicly available in the crawled content. The contributor agreement also suggests the project has a formal contribution process, but open-source licensing is not confirmed in the provided pages.