nano-banana-pro
Generate images using Google's Nano Banana Pro (gemini-3-pro-image-preview). Accepts text prompts and optionally images (for editing/transformation) as INPUT. Returns generated IMAGES as OUTPUT. Use when user asks to create, generate, edit, or draw images, infographics, visualizations, diagrams, charts, or illustrations. Excellent for data-accurate infographics and text rendering.
$ Installieren
git clone https://github.com/stared/gemini-claude-skills /tmp/gemini-claude-skills && cp -r /tmp/gemini-claude-skills/skills/nano-banana-pro ~/.claude/skills/gemini-claude-skills// tip: Run this command in your terminal to install the skill
name: nano-banana-pro description: Generate images using Google's Nano Banana Pro (gemini-3-pro-image-preview). Accepts text prompts and optionally images (for editing/transformation) as INPUT. Returns generated IMAGES as OUTPUT. Use when user asks to create, generate, edit, or draw images, infographics, visualizations, diagrams, charts, or illustrations. Excellent for data-accurate infographics and text rendering. allowed-tools: Bash(uv:*), Write, Read
Nano Banana Pro Image Generator
Generate images using Google's advanced Nano Banana Pro model (gemini-3-pro-image-preview).
Prerequisites
The user must have GEMINI_API_KEY environment variable set with a valid Google AI API key.
Usage
The script is located in the same directory as this SKILL.md file. Run it with uv run:
uv run /path/to/skills/nano-banana-pro/generate_image.py "your prompt" -o output.png
When this skill is invoked, locate generate_image.py in the skill directory and run it.
Parameters
| Parameter | Required | Description |
|---|---|---|
prompt | Yes | Text description of the image to generate |
-o, --output | Yes | Output filename (you decide the path based on context) |
--aspect-ratio | No | One of: 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9 (default: 1:1) |
--size | No | Image size: 1K, 2K, 4K (default: 1K) |
Examples
Basic image generation:
uv run generate_image.py "A sunset over mountains" -o sunset.png
Infographic with specific aspect ratio:
uv run generate_image.py "Infographic showing the water cycle with labeled stages" -o water_cycle.png --aspect-ratio 9:16
High-resolution ultrawide:
uv run generate_image.py "Professional photo of a modern office space" -o office.png --aspect-ratio 21:9 --size 4K
Model Capabilities
Nano Banana Pro excels at:
- Accurate infographics with real data (uses Google Search grounding)
- Text rendering in images
- Cartographic visualizations and maps
- Detailed instruction following
- Chain-of-thought reasoning for complex visual tasks
Output
The script prints:
- Progress message while generating
- Path to saved image on success
- Any text response from the model
- Error message if no image was generated
Repository
