Claude Code

OpenAI's open-source coding agent for the terminal.

A lightweight, open-source coding agent that runs locally in your terminal, reading your repository, editing files, and running commands in a conversational loop you review in real time. Built in Rust for speed, it supports Model Context Protocol tools, subagents for parallel tasks, and switching between GPT models. Sign in with a ChatGPT plan (Plus, Pro, Business, Edu, or Enterprise) or use an OpenAI API key.

Google's open-source Gemini AI agent, in your terminal.

An open-source command-line agent that brings Gemini into the terminal for coding, debugging, content generation, and research. Ships built-in Google Search grounding, Model Context Protocol support, and project context via a GEMINI.md file, plus a non-interactive mode for scripting and CI. Free to use by signing in with a personal Google account, with paid options through AI Studio, Vertex AI, and Gemini Code Assist.

AI-first code editor. Multi-model, tab-completion native.

Fork of VS Code with deep model integration — multi-line tab completion, agent mode, chat with codebase context. Strong for fast iteration on existing repos.

Terminal-native pair programmer. BYO key, BYO model.

Open-source CLI for AI pair-programming directly against your git repo. Brings any model (Claude, Gemini, GPT, local) into a tight commit-per-task loop.