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Generate or edit images using AI models (FLUX, Nano Banana 2). Use for general-purpose image generation including photos, illustrations, artwork, visual…
Generate Image Generate and edit high-quality images using OpenRouter's image generation models including FLUX.2 Pro and Gemini 3.1 Flash Image Preview. When to Use This Skill Use generate-image for: Photos and photorealistic images Artistic illustrations and artwork Concept art and visual concepts Visual assets for presentations or documents Image editing and modifications Any general-purpose image generation needs Use scientific-schematics instead for: Flowcharts and process diagrams Circuit diagrams and electrical schematics Biological pathways and signaling cascades System architecture diagrams CONSORT diagrams and methodology flowcharts Any technical/schematic diagrams Quick Start Use the scripts/generate_image.py script to generate or edit images: # Generate a new image python scripts/generate_image.py "A beautiful sunset over mountains" # Edit an existing image python scripts/generate_image.py "Make the sky purple" --input photo.jpg This generates/edits an image and saves it as generated_image.png in the current directory. API Key Setup CRITICAL: The script requires an OpenRouter API key. Before running, check if the user has configured their API key: Look for a .env file in the project directory or parent directories Check for OPENROUTER_API_KEY=<key> in the .env file If not found, inform the user they need to: Create a .env file with OPENROUTER_API_KEY=your-api-key-here Or set the environment variable: export OPENROUTER_API_KEY=your-api-key-here Get an API key from: https://openrouter.ai/keys The script will automatically detect the .env file and provide clear error messages if the API key is missing. Model Selection Default model: google/gemini-3.1-flash-image-preview (high quality, recommended) Available models for generation and editing: google/gemini-3.1-flash-image-preview - High quality, supports generation + editing black-forest-labs/flux.2-pro - Fast, high quality, supports generation + editing Generation only: black-forest-labs/flux.2-flex - Fast and cheap, but not as high quality as pro Select based on: Quality: Use gemini-3.1-flash-image-preview or flux.2-pro Editing: Use gemini-3.1-flash-image-preview or flux.2-pro (both support image editing) Cost: Use flux.2-flex for generation only Common Usage Patterns Basic generation python scripts/generate_image.py "Your prompt here" Specify model python scripts/generate_image.py "A cat in space" --model "black-forest-labs/flux.2-pro" Custom output path python scripts/generate_image.py "Abstract art" --output artwork.png Edit an existing image python scripts/generate_image.py "Make the background blue" --input photo.jpg Edit with a specific model python scripts/generate_image.py "Add sunglasses to the person" --input portrait.png --model "black-forest-labs/flux.2-pro" Edit with custom output python scripts/generate_image.py "Remove the text from the image" --input screenshot.png --output cleaned.png Multiple images Run the script multiple times with different prompts or output paths: python scripts/generate_image.py "Image 1 description" --output image1.png python scripts/generate_image.py "Image 2 description" --output image2.png Script Parameters prompt (required): Text description of the image to generate, or editing instructions --input or -i: Input image path for editing (enables edit mode) --model or -m: OpenRouter model ID (default: google/gemini-3.1-flash-image-preview) --output or -o: Output file path (default: generated_image.png) --api-key: OpenRouter API key (overrides .env file) Example Use Cases For Scientific Documents # Generate a conceptual illustration for a paper python scripts/generate_image.py "Microscopic view of cancer cells being attacked by immunotherapy agents, scientific illustration style" --output figures/immunotherapy_concept.png # Create a visual for a presentation python scripts/generate_image.py "DNA double helix structure with highlighted mutation site, modern scientific visualization" --output slides/dna_mutation.png For Presentations and Posters # Title slide background python scripts/generate_image.py "Abstract blue and white background with subtle molecular patterns, professional presentation style" --output slides/background.png # Poster hero image python scripts/generate_image.py "Laboratory setting with modern equipment, photorealistic, well-lit" --output poster/hero.png For General Visual Content # Website or documentation images python scripts/generate_image.py "Professional team collaboration around a digital whiteboard, modern office" --output docs/team_collaboration.png # Marketing materials python scripts/generate_image.py "Futuristic AI brain concept with glowing neural networks" --output marketing/ai_concept.png Error Handling The script provides clear error messages for: Missing API key (with setup instructions) API errors (with status codes) Unexpected response formats Missing dependencies (requests library) If the script fails, read the error message and address the issue before retrying. Notes Images are returned as base64-encoded data URLs and automatically saved as PNG files The script supports both images and content response formats from different OpenRouter models Generation time varies by model (typically 5-30 seconds) For image editing, the input image is encoded as base64 and sent to the model Supported input image formats: PNG, JPEG, GIF, WebP Check OpenRouter pricing for cost information: https://openrouter.ai/models Image Editing Tips Be specific about what changes you want (e.g., "change the sky to sunset colors" vs "edit the sky") Reference specific elements in the image when possible For best results, use clear and detailed editing instructions Both Gemini 3.1 Flash Image Preview and FLUX.2 Pro support image editing through OpenRouter Integration with Other Skills scientific-schematics: Use for technical diagrams, flowcharts, circuits, pathways generate-image: Use for photos, illustrations, artwork, visual concepts scientific-slides: Combine with generate-image for visually rich presentations latex-posters: Use generate-image for poster visuals and hero images
don't have the plugin yet? install it then click "run inline in claude" again.