Aider vs Claude Code

aider is an open-source AI pair programming tool that runs in the terminal and works with local git repositories. It connects to language models like GPT-4 and Claude to edit code directly in existing projects, automatically creating git commits for changes. The tool supports multiple programming languages and can edit multiple files simultaneously.

Claude Code is a command-line tool by Anthropic that enables developers to delegate coding tasks to Claude directly from their terminal. It provides agentic coding capabilities including file editing, test running, and Git operations.