Nano Banana Pro - AI Image Generation

Generate images using Google's Gemini 3 Pro Image model.

Usage

Run the generation script:

python ~/.claude/skills/nano-banana-pro/generate_image.py "your prompt here" [options]

Options

Option	Description	Default
--resolution	Output size: 1K, 2K, or 4K	2K
--aspect	Aspect ratio: 16:9, 1:1, 4:3, 9:16, 3:4	16:9
--output	Output directory path	./generated_images
--reference	Reference image(s) for style/editing (up to 14)	None
--format	Output format: png, jpeg, webp	png

Examples

Basic generation

python ~/.claude/skills/nano-banana-pro/generate_image.py "a serene mountain landscape at sunset, photorealistic"

Square image for social media

python ~/.claude/skills/nano-banana-pro/generate_image.py "abstract geometric pattern in blue and gold" --aspect 1:1 --resolution 2K

High-res with custom output

python ~/.claude/skills/nano-banana-pro/generate_image.py "futuristic city skyline" --resolution 4K --output ~/Pictures/ai-generated

Style transfer with reference image

python ~/.claude/skills/nano-banana-pro/generate_image.py "transform this into a watercolor painting" --reference input.jpg

Image editing with reference

python ~/.claude/skills/nano-banana-pro/generate_image.py "add a rainbow in the sky" --reference landscape.png

Output

Images are saved with timestamp filenames:

• Format: {timestamp}_{sanitized_prompt}.{format}
• Example: 20260106_143052_serene_mountain_landscape.png

The script outputs the full path to the generated image.

Requirements

• Python 3.10+
• google-genai library
• GEMINI_API_KEY environment variable

Notes

• Gemini 3 Pro Image requires paid billing (no free tier)
• Generated images include SynthID watermarking
• Reference images enable style transfer and editing capabilities
• No text by default: The script automatically adds "no text/typography" instructions unless your prompt explicitly mentions text, typography, words, or labels. To include text, add words like "with text overlay" or "include typography" to your prompt.