ByteDanceFastStandard

SDXL Lightning 4-step

ByteDance's 4-step SDXL Lightning — the most-run model on Replicate (1B+ runs). Near-instant 1024px image generation at one of the lowest prices in the catalog.

4 credits

per image (num_outputs billed per image)

1B+ runs — the most-run model on Replicate

4-step generation: near-instant results

Up to 1280px output, up to 4 images per request

Negative prompt and scheduler control

One of the lowest prices in the catalog (5 credits/image)

Run it right now

Test this model instantly in the Console Playground — no code required

Use with AI Assistant

Copy usage instructions for Claude, ChatGPT, or other AI

llms.txtllms.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": "bytedance/sdxl-lightning-4step",
  "input": {
    "prompt": "self-portrait of a woman, lightning in the background",
    "width": 1024,
    "height": 1024,
    "num_inference_steps": 4
  }
}'

Parameters

Parameter	Type	Required	Default	Description
`prompt`	string	No	self-portrait of a woman, lightning in the background	Input prompt
`negative_prompt`	string	No	worst quality, low quality	What to avoid in the image
`width`	integer	No	1024	Output width (256-1280). 1024 or 1280 recommended
`height`	integer	No	1024	Output height (256-1280). 1024 or 1280 recommended
`num_outputs`	integer	No	1	Number of images (1-4). Billed per image
`scheduler`	string	No	K_EULER	scheduler DDIMDPMSolverMultistepHeunDiscreteKarrasDPMK_EULER_ANCESTRALK_EULERPNDMDPM++2MSDE
`num_inference_steps`	integer	No	4	Denoising steps (1-10). 4 gives the best results
`guidance_scale`	number	No	0	Classifier-free guidance scale. Keep 0 for Lightning
`seed`	integer	No	0	Random seed. Leave blank to randomize
`disable_safety_checker`	boolean	No	false	Disable safety checker for generated images

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

Instant Concept Art

Generate a 1024px image in under a second of compute

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "bytedance/sdxl-lightning-4step",
  "input": {
    "prompt": "self-portrait of a woman, lightning in the background",
    "width": 1024,
    "height": 1024,
    "num_inference_steps": 4
  }
}'