Black Forest LabsFastHigh

FLUX.1 Schnell

Ultra-fast image generation model optimized for speed. Generates high-quality images in just 1-2 seconds, perfect for real-time applications and rapid prototyping.

3 credits

per image

Ultra-fast generation (1-2 seconds)

High-quality output at 1024x1024

Excellent prompt understanding

Great for real-time applications

Low credit cost per generation

Use with AI Assistant

Copy usage instructions for Claude, ChatGPT, or other AI

llms.txt

Quick Start

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "black-forest-labs/flux-schnell",
  "input": {
    "prompt": "A sleek wireless headphone on a minimalist white marble surface, professional product photography, soft studio lighting, 8k ultra detailed",
    "image_size": "landscape_4_3",
    "num_inference_steps": 4
  }
}'

Parameters

Parameter	Type	Required	Default	Description
`prompt`	string	Yes	-	Text description of the image to generate
`aspect_ratio`	string	No	1:1	Aspect ratio for the generated image 1:116:99:164:33:43:22:3
`num_outputs`	integer	No	1	Number of outputs to generate
`num_inference_steps`	integer	No	4	Number of denoising steps (recommended: 4)
`seed`	integer	No	-	Random seed for reproducibility
`output_format`	string	No	png	Format of output images pngjpgwebp
`output_quality`	integer	No	80	Quality of output images (0-100)
`go_fast`	boolean	No	-	Run faster with fp8 quantized model
`megapixels`	string	No	1	Approximate megapixels for output 0.251

Common Parameters

Common parameters used when calling POST /v1/predictions.

Parameter	Type	Required	Default	Description
`model`	string	Yes	-	Model identifier
`input`	object	Yes	-	Object containing the model-specific parameters from the table above
`output_folder`	string	No	-	Folder path for output files (max 256 chars, '..' not allowed)
`webhook_url`	string	No	-	Webhook URL to call on completion
`is_public`	boolean	No	false	If true, output files are also available via permanent public URLs

Examples

Product Photography

Generate professional product shots

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "black-forest-labs/flux-schnell",
  "input": {
    "prompt": "A sleek wireless headphone on a minimalist white marble surface, professional product photography, soft studio lighting, 8k ultra detailed",
    "image_size": "landscape_4_3",
    "num_inference_steps": 4
  }
}'

Character Design

Create unique character concepts

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "black-forest-labs/flux-schnell",
  "input": {
    "prompt": "A cyberpunk samurai warrior with glowing neon armor, detailed character design, concept art style, dramatic lighting",
    "image_size": "portrait_4_3"
  }
}'

Landscape Art

Generate stunning landscapes

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "black-forest-labs/flux-schnell",
  "input": {
    "prompt": "Breathtaking mountain vista at golden hour, misty valleys below, photorealistic landscape photography, National Geographic style",
    "image_size": "landscape_16_9"
  }
}'