Black Forest LabsFastUltra

FLUX 1.1 Pro

Fast high-quality image generation, an upgrade to FLUX.1 Pro with faster speed and improved quality. Perfect for production workloads requiring both speed and fidelity.

72 credits

per image

Faster than FLUX.1 Pro

Improved image quality

Ultra-quality output

Production-ready performance

Excellent prompt adherence

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-1.1-pro",
  "input": {
    "prompt": "Cinematic portrait of a woman in golden hour light, shallow depth of field, film grain, professional photography, 8k ultra detailed",
    "image_size": "portrait_4_3"
  }
}'

Parameters

Parameter	Type	Required	Default	Description
`prompt`	string	Yes	-	Text description of the image to generate
`image_size`	string	No	landscape_4_3	Output image dimensions square_hdsquareportrait_4_3portrait_16_9landscape_4_3landscape_16_9
`seed`	integer	No	-	Random seed for reproducibility
`safety_tolerance`	string	No	2	Content safety level (1-6)

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

Cinematic Portrait

Generate a high-quality cinematic portrait

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-1.1-pro",
  "input": {
    "prompt": "Cinematic portrait of a woman in golden hour light, shallow depth of field, film grain, professional photography, 8k ultra detailed",
    "image_size": "portrait_4_3"
  }
}'

Architectural Visualization

Create photorealistic architectural rendering

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-1.1-pro",
  "input": {
    "prompt": "Modern luxury villa with infinity pool overlooking the ocean, architectural photography, golden hour, ultra detailed, professional rendering",
    "image_size": "landscape_16_9"
  }
}'