Overview Hey everyone 👋 Google recently dropped something that's been flying under the radar: Gemini CLI, a free, open source AI agent that brings the power of Gemini directly into your terminal. While everyone's been debating Cursor vs Claude Code, Google quietly built a terminal AI that's actually free and surprisingly capable. I've been using it for a few weeks, and I wanted to share what it is, how it works, where it shines, and where it falls short compared to the competition. Let's dive in! 🤙 Gemini CLI is an open source AI agent that runs entirely in your terminal. Think of it as having Gemini 2.5 sitting at your command line, able to read your code, write files, run commands, and help you build software through conversation. It's not just a chatbot with access to your terminal, it's an agentic tool that uses a ReAct (Reason and Act) loop to complete complex tasks autonomously. You give it a goal, it makes a plan, executes steps, validates results, and iterates until the task is complete. Google built Gemini CLI with a terminal-first philosophy. It's designed for developers who live in the command line and don't want to context-switch to a GUI. Everything happens in a single terminal pane: the conversation, file edits, command execution, and results. This is different from tools like Cursor, which give you a full IDE experience. Gemini CLI embraces minimalism, the terminal is your interface, and that's it. Installing Gemini CLI is dead simple: npm install -g @google/gemini-cli Or use it without installing: npx @google/gemini-cli Once installed, just type gemini in your project directory, authenticate with your Google account, and you're in. Gemini CLI offers several auth methods: Personal Google Account (Free): Google AI Studio API Key: Vertex AI: Most individual developers will be perfectly happy with the free tier. 60 requests per minute is generous for typical development workflows. When you start Gemini CLI, you get an interactive prompt. You can: Ask questions about your codebase Request file edits or new features Run terminal commands through the agent Search the web for documentation Work with images and documents Execute multi-step workflows The agent reads your entire project context (up to 1M tokens with Gemini 2.5 Pro), understands your code structure, and makes changes that respect your existing patterns. Example conversation: You: Add user authentication to this Express app with JWT tokens Agent: [reads codebase, creates plan] Agent: I'll create: 1. auth middleware (auth.js) 2. login/signup routes (routes/auth.js) 3. JWT token utilities (utils/jwt.js) 4. update existing routes to use auth middleware Proceed? (y/n) You approve, and the agent executes the plan, creating files, writing code, and updating your project. Gemini CLI comes with several built-in tools that the agent uses automatically: Google Search Integration: File Operations: Shell Command Execution: Web Fetching: MCP Server Support: Gemini CLI isn't alone in the terminal AI space. Let's see how it stacks up against the main players. Claude Code is a terminal-based AI coding assistant built on Anthropic's Claude models. It enables developers to generate, refactor, and reason about code through conversational prompts directly in the command line. Similarities: Key Differences: Pricing: My take: Claude Code is more mature and polished, but Gemini CLI's free tier is hard to beat for individuals. Aider is a Git-native, terminal-based AI coding assistant built to support collaborative, open source workflows. Similarities: Key Differences: My take: If you care deeply about git-native workflows, Aider wins. If you want Google Search integration and broader capabilities, Gemini CLI is better. Cursor isn't really a competitor, it's a different category. Cursor operates as a full-featured IDE with AI capabilities embedded throughout the interface, while Gemini CLI is terminal-only. The Difference: My take: Many developers use both. Cursor for active coding sessions, Gemini CLI for delegated tasks or automation. After using Gemini CLI alongside other tools, here's where it genuinely shines: 60 requests per minute and 1,000 requests per day is generous. Most developers won't hit these limits in normal usage. This makes Gemini CLI the most accessible terminal AI for individuals and students. Claude Code costs money from day one. Gemini CLI is actually free for most use cases. 1M tokens with Gemini 2.5 Pro means you can load massive codebases into context. For large refactoring tasks or understanding complex systems, this is powerful. I've successfully used it to analyze entire monorepos that would have required chunking with smaller context windows. The built-in Google Search tool is surprisingly useful. When the agent encounters something it doesn't know (a new API, a recent framework update, etc.), it can search the web and incorporate current information. This beats having to manually look things up and paste documentation into the conversation. Configure MCP servers in ~/.gemini/settings.json to extend Gemini CLI with custom tools. Want to integrate GitHub, Slack, databases, or custom APIs? MCP makes it straightforward. This extensibility means Gemini CLI can grow with your needs. Gemini's vision capabilities are available in the CLI. You can include images in your prompts, perfect for "implement this UI mockup" or "what's wrong with this screenshot" tasks. Not many terminal AIs support this out of the box. Install with npm, authenticate with Google, done. No API keys to manage (unless you want to), no credit card required, no complex setup. This makes it perfect for trying out terminal AI without commitment. Nothing's perfect, and Gemini CLI has real weaknesses: Compared to Claude Code's refined interface, Gemini CLI feels rougher around the edges. Error messages aren't always clear, the terminal UI can get cluttered, and occasionally the agent loses track of context mid-task. It's usable, but it's not as smooth as more mature tools. Gemini 2.5 Pro is powerful, but it's not Claude Opus. Claude Code for reasoning depth (80.9% SWE-bench). Gemini scores lower on code-specific benchmarks. For complex reasoning or nuanced refactoring, Claude Code often produces better results. Claude Code and Aider have large, active communities. Gemini CLI is newer, so there are fewer tutorials, examples, and community-built extensions. When you hit an issue, you're more likely to be on your own. Some developers prefer having a visual IDE experience with file trees, side-by-side diffs, and graphical interfaces. Gemini CLI offers none of that, it's terminal or nothing. If you're not comfortable working purely in the command line, this is a dealbreaker. While 60 req/min is generous, heavy users will hit the 1,000 req/day limit. If you're doing intensive work, you'll need to either slow down or pay for API access. Claude Code's pay-per-token model might actually be cheaper for very heavy usage. Here's what I've actually used Gemini CLI for: Refactoring Legacy Code: Documentation Generation: Debugging: Prototyping: Learning New Tech: Gemini CLI isn't for everyone. Here's who will benefit most: Students and Learners: Individual Developers: Open Source Maintainers: Developers Trying Terminal AI: Budget-Conscious Teams: Gemini CLI isn't ideal if: You Need the Best Code Quality: You Prefer Visual IDEs: You're a Power User: You Need Enterprise Features: Gemini CLI is a solid terminal AI that punches above its weight thanks to the generous free tier. It's not the most polished, and it's not the highest quality, but it's free and good enough for most tasks. If you're an individual developer who lives in the terminal and wants to try AI-assisted development without paying, Gemini CLI is the obvious choice. The 60 req/min and 1,000 req/day limits are genuinely usable. That said, if you're doing professional work where code quality matters and you can afford $20-40/month, Claude Code is still better. The reasoning quality, the polish, and the maturity are worth paying for. But for learning, side projects, open source work, and experimentation? Gemini CLI is fantastic. Google's strategy of making it free is smart, it gets developers hooked on terminal AI without financial friction. If you're curious, just run: npx @google/gemini-cli No commitment, no credit card, no setup beyond Node.js. Try a few tasks and see how it feels. The worst that happens is you waste 10 minutes. The best that happens is you discover a free tool that transforms how you work. Happy coding! ✨ Hi 👋🏻 🌲 Linktree: https://linktr.ee/domenicotenace https://github.com/Domenico-Tenace-Open-Labs Follow me on dev.to for more articles 👇 Domenico TenaceFollow Passionate about the IT world and everything related to it ✌🏻 Open Source enthusiastic 🦠 If you like my content or want to support my work, you can support me with a small donation. I would be grateful 🥹