How to Install Gemini CLI on Windows, macOS, and Linux (Step-by-Step Guide)

Gemini CLI lets you access Google’s Gemini AI models directly from your terminal. It works across Windows, macOS, and Linux and fits perfectly into developer workflows for coding, debugging, automation, and research.

This guide shows the exact steps to install Gemini CLI, run it on your system, and choose the right installation method for your setup.

System Requirements (Check Before Installing)

Make sure your system meets these basics:

OS
- Windows 11 (24H2 or newer)
- macOS 15+
- Ubuntu 20.04+
Runtime: Node.js 20.0.0 or newer
Shell: Bash or Zsh
RAM:
- 4 GB (light usage)
- 16 GB+ (large codebases, long sessions)
Internet: Required

If Node.js is missing, install it first from the official Node.js site.

Method 1: Install Gemini CLI Using npm (Recommended)

This method works on Windows, macOS, and Linux.

Open Terminal (or PowerShell on Windows).
Run this command:

npm install -g @google/gemini-cli

Verify installation:

gemini --help

If the help menu appears, the installation succeeded.

Method 2: Install with Homebrew (macOS & Linux)

If you already use Homebrew:

brew install gemini-cli

Then start the CLI:

gemini

Method 3: Install with MacPorts (macOS Only)

For MacPorts users:

sudo port install gemini-cli

Method 4: Install with Anaconda (Restricted Environments)

Use this option if your system restricts global npm installs.

conda create -y -n gemini_env -c conda-forge nodejs
conda activate gemini_env
npm install -g @google/gemini-cli

Run Gemini CLI (Basic Usage)

Start Gemini in your current folder:

gemini

Ask a direct question:

gemini -p "Explain this codebase"

Use it inside scripts (non-interactive mode):

gemini -p "Generate release notes" --output-format json

Run Gemini CLI Without Installing (npx Method)

If you want to test it without installing anything:

npx @google/gemini-cli

This method runs the latest version instantly.

Use Gemini CLI in a Secure Sandbox (Docker)

Run Gemini CLI inside a container for isolation:

docker run --rm -it us-docker.pkg.dev/gemini-code-dev/gemini-cli/sandbox:0.1.1

If Gemini CLI is already installed locally, force sandbox mode:

gemini --sandbox -y -p "Your prompt here"

Sign In and Authenticate

When you run gemini for the first time, the CLI prompts you to sign in.

Option 1: Google Account (Best for Individuals)

No API key required
Free tier available
Automatic model updates

Just run:

gemini

Then complete the browser login.

Option 2: Gemini API Key

export GEMINI_API_KEY="YOUR_API_KEY"
gemini

Option 3: Vertex AI (Enterprise)

export GOOGLE_API_KEY="YOUR_API_KEY"
export GOOGLE_GENAI_USE_VERTEXAI=true
gemini

Which Gemini CLI Version Is Right for You?

Stable (default): Best for most users

npm install -g @google/gemini-cli@lates

Preview: Test upcoming features

npm install -g @google/gemini-cli@preview

Nightly: Daily builds (may be unstable)

npm install -g @google/gemini-cli@nightly

Common Installation Issues (Quick Fixes)

gemini command not found: Restart your terminal or check npm global path.
Node version too old: Upgrade Node.js to v20+.
Permission errors: Use Anaconda method or fix npm permissions.

Gemini CLI gives you fast, terminal-first access to Gemini models for coding, research, and automation. Install it once, authenticate, and it becomes part of your daily developer workflow—no browser tabs required.