nano-banana-image-gen
Image Generation with imagen CLI
Generate images using the imagen CLI — a unified interface for Google Gemini and OpenAI image models. Supports text prompts, multiple aspect ratios, output formats, batch generation, and more.
Prerequisites
- imagen CLI: Install via
curl -fsSL https://raw.githubusercontent.com/ozten/imagen/main/scripts/install.sh | bash - API Keys: Configure via environment variables or config file (see below)
Quick Start
# Basic generation (uses default nano-banana / gemini-3-pro-image-preview)
imagen "A cat wearing a top hat" -o cat.jpg
# With aspect ratio
imagen "Mountain panorama" --aspect-ratio 16:9 -o mountains.jpg
# Using OpenAI model
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