Gemini

Gemini CLI is Google’s open-source agentic coding agent for the terminal—ReAct loop, built-in tools (files, shell, search), MCP servers, and large-context Gemini models. We rate it trial under AI Agent: a solid choice on Google accounts or Gemini API when you want Google’s stack and Agent Skills portability; we usually default to Cursor + cursor-agent for daily editor work and Claude Code / Codex for other vendor stacks.

Blurb

Gemini CLI is an open-source AI agent that brings Gemini directly into your terminal. It helps you build, debug, and automate development workflows with built-in tools and MCP support.

Summary

Gemini CLI (google-gemini/gemini-cli) runs an agent loop in your repo: reason, call tools, checkpoint conversations, and load project context via GEMINI.md. It shares quota with Gemini Code Assist agent mode on free and paid Google tiers.

Use for interactive coding, refactors, and skill-driven workflows when Gemini models or Google Cloud billing are the constraint. It is a repo-bounded AI Agent—not an omnichannel personal bot (OpenClaw, Hermes are hold). For scheduled automation, prefer deterministic scripts and Dagu with LLM steps only where reasoning is required.

Compare Claude Code (Anthropic) and Codex (OpenAI) for the same agent-loop-in-repo pattern.

Details

• Install: npm install -g @google/gemini-cli, Homebrew (brew install gemini-cli), or npx from GitHub; Node.js 20+.
• Auth: Google account (free tier quotas) or Gemini API key for pay-as-you-go.
• Models: Gemini 2.5 Pro and successors; very large context windows per Google docs.
• Skills: SKILL.md / Agent Skills ecosystem—see Agent Skills - Sources for cross-agent collections.
• Fit: Tool / AI Agent—agent-loop coding tool (also branded Gemini Code Assist in IDE surfaces).
• Contrast: Cursor + cursor-agent for default IDE workflow; Claude Code / Codex on other vendors.