Gemini CLI

Gemini CLI is Google's official command-line coding agent, an open-source npm package (`@google/gemini-cli`) that drops Gemini 3 directly into your terminal. It can read and edit large codebases, scaffold apps from images or PDFs, and chain together multi-step workflows without ever leaving the shell. Conceptually it sits in the same lane as Claude Code, Aider, and OpenAI Codex CLI: a long-running agent that operates over your local files with tool use, planning, and human-in-the-loop confirmation.

The pitch versus competitors is the Gemini context window and Google's pricing posture. There is a meaningful free tier tied to a personal Google account, with paid usage flowing through Google One / AI subscriptions for higher quotas. That makes it one of the cheaper ways to drive a frontier model from the terminal for solo developers and tinkerers, especially anyone already inside Google's ecosystem. Note that Google is reshuffling its CLI lineup: unpaid users are being migrated to the newer Antigravity CLI, so the free path here is in flux.

The repo lives at github.com/google-gemini/gemini-cli with active development from the Gemini team. Because it's Apache-licensed and extensible, it slots cleanly into CI, dev containers, and scripted pipelines, and it can call out to MCP servers and shell tools. Worth keeping an eye on if Claude Code's pricing or rate limits become a problem.