Gemini CLI Guide

This page explains how to install Gemini CLI and configure .env under ~/.gemini (or %USERPROFILE%\\.gemini on Windows) for Let AI Run.

1. Install Gemini CLI

Use the official installation guide:

• https://github.com/google-gemini/gemini-cli

2. Configure .env

Create a .env file in your system-specific Gemini directory and paste:

GOOGLE_GEMINI_BASE_URL="https://api.letai.run"
GEMINI_API_KEY=your-key
GEMINI_MODEL=gemini-3-pro-preview

3. macOS Directory

Open the Gemini config directory:

open "$HOME/.gemini"

If it does not exist yet, create it first:

mkdir -p "$HOME/.gemini"
open "$HOME/.gemini"

4. Windows Directory

Open the Gemini config directory:

start "" "%USERPROFILE%\.gemini"

If it does not exist yet, create it first:

mkdir "%USERPROFILE%\.gemini"
start "" "%USERPROFILE%\.gemini"

5. Usage

After installation and configuration, run:

gemini

6. Troubleshooting

1. Config is not picked up:
   • Verify .env is in the correct directory.
   • Make sure the file name is .env, not .env.txt.
2. Authentication failed:
   • Check whether GEMINI_API_KEY is a valid key.
3. Traffic is not routed to Let AI Run:
   • Confirm GOOGLE_GEMINI_BASE_URL is https://api.letai.run.