bytedance/sdxl-lightning-4step

SDXL-Lightning by ByteDance: a fast text-to-image model that makes high-quality images in 4 steps

Capabilities

1:1 4:3 3:4 16:9 9:16 2:3 3:2 Negative Prompt Seed

Community model (estimated from hardware time)

Name	Type	Description	Default	Constraints
`disable_safety_checker`	boolean	Disable safety checker for generated images	`false`	—
`guidance_scale`	number	Scale for classifier-free guidance	`0`	min: 0, max: 50
`height`	integer	Height of output image. Recommended 1024 or 1280	`1024`	min: 256, max: 1280
`negative_prompt`	string	Negative Input prompt	`"worst quality, low quality"`	—
`num_inference_steps`	integer	Number of denoising steps. 4 for best results	`4`	min: 1, max: 10
`num_outputs`	integer	Number of images to output.	`1`	min: 1, max: 4
`prompt`	string	Input prompt	`"self-portrait of a woman, lightning in the background"`	—
`scheduler`	string	scheduler	`"K_EULER"`	DDIM DPMSolverMultistep HeunDiscrete KarrasDPM K_EULER_ANCESTRAL K_EULER PNDM DPM++2MSDE
`seed`	integer	Random seed. Leave blank to randomize the seed	`0`	—
`width`	integer	Width of output image. Recommended 1024 or 1280	`1024`	min: 256, max: 1280

disable_safety_checker boolean

Disable safety checker for generated images

Default: false

guidance_scale number

Scale for classifier-free guidance

Default: 0 min: 0, max: 50

height integer

Height of output image. Recommended 1024 or 1280

Default: 1024 min: 256, max: 1280

negative_prompt string

Negative Input prompt

Default: "worst quality, low quality"

num_inference_steps integer

Number of denoising steps. 4 for best results

Default: 4 min: 1, max: 10

num_outputs integer

Number of images to output.

Default: 1 min: 1, max: 4

prompt string

Input prompt

Default: "self-portrait of a woman, lightning in the background"

scheduler string

scheduler

Default: "K_EULER"

DDIM DPMSolverMultistep HeunDiscrete KarrasDPM K_EULER_ANCESTRAL K_EULER PNDM DPM++2MSDE

seed integer

Random seed. Leave blank to randomize the seed

Default: 0

width integer

Width of output image. Recommended 1024 or 1280

Default: 1024 min: 256, max: 1280

Version: 6f7a773af6fc Updated: 2/26/2026 1033.2M runs