EDIT

# Using npx (no installation required)
npx @google/gemini-cli
npm install -g @google/gemini-cli
brew install gemini-cli
sudo port install gemini-cli
# Create and activate a new environment
conda create -y -n gemini_env -c conda-forge nodejs
conda activate gemini_env
# Install Gemini CLI globally via npm (inside the environment)
npm install -g @google/gemini-cli
npm install -g @google/gemini-cli@preview
npm install -g @google/gemini-cli@latest
npm install -g @google/gemini-cli@nightly