OpenRouter
Coding
OpenRouter is a unified API for accessing hundreds of LLMs from different providers.
AIAPI
Aider
AI pair programming in your terminal — edit your codebase with your favorite LLM.
AIOpen SourceDeveloper ToolsCodingTerminalFree
Aider is an open-source AI pair programming tool that runs in your terminal. It connects to top LLMs like Claude, GPT-4o, and DeepSeek to edit code directly in your git repo and auto-commit each change with a sensible message. It maps your whole codebase for context, supports 100+ languages, and works with cloud or local models.
aider.chat
Key Features
Terminal Pair Programming
Ask an LLM to implement features, fix bugs, or refactor — Aider edits your files right in the repo from the command line.
Auto-Commit
Every AI change is committed with a clear message, so you can diff, review, and undo with familiar git tools.
Codebase Map
Aider builds a map of your whole project, so it understands structure and dependencies even in large codebases.
Multi-Model
Use Claude, GPT, DeepSeek, or local models — Python, JavaScript, Rust, Go, and dozens more languages supported.
Pros
- Open source and completely free to use
- Works in your terminal with any editor or IDE
- Auto-commits changes — easy to review and undo
- Supports cloud and local models, plus voice input
Considerations
- Requires your own LLM API keys
- Terminal-based, no graphical interface
- Output quality depends on the model you choose
Best For
Developers
Coding / Debugging / Automation
Software engineers
Coding / Debugging / Automation
Terminal power users
Search / Summaries / Daily
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