black-forest-labs/flux-schnell-lora

The fastest image generation model tailored for fine-tuned use

Capabilities

Seed

Cost

Community model (estimated from hardware time)

Input Parameters

Name	Type	Description	Default	Constraints
`prompt`*	string	Prompt for generated image	`—`	—
`aspect_ratio`	string	Aspect ratio for the generated image	`"1:1"`	1:116:921:93:22:34:55:43:44:39:169:21
`disable_safety_checker`	boolean	Disable safety checker for generated images.	`false`	—
`go_fast`	boolean	Run faster predictions with model optimized for speed (currently fp8 quantized); disable to run in original bf16. Note that outputs will not be deterministic when this is enabled, even if you set a seed.	`true`	—
`lora_scale`	number	Determines how strongly the main LoRA should be applied. Sane results between 0 and 1 for base inference. For go_fast we apply a 1.5x multiplier to this value; we've generally seen good performance when scaling the base value by that amount. You may still need to experiment to find the best value for your particular lora.	`1`	min: -1, max: 3
`lora_weights`	string	Load LoRA weights. Supports Replicate models in the format <owner>/<username> or <owner>/<username>/<version>, HuggingFace URLs in the format huggingface.co/<owner>/<model-name>, CivitAI URLs in the format civitai.com/models/<id>[/<model-name>], or arbitrary .safetensors URLs from the Internet. For example, 'fofr/flux-pixar-cars'	`—`	—
`megapixels`	string	Approximate number of megapixels for generated image	`"1"`	10.25
`num_inference_steps`	integer	Number of denoising steps. 4 is recommended, and lower number of steps produce lower quality outputs, faster.	`4`	min: 1, max: 4
`num_outputs`	integer	Number of outputs to generate	`1`	min: 1, max: 4
`output_format`	string	Format of the output images	`"webp"`	webpjpgpng
`output_quality`	integer	Quality when saving the output images, from 0 to 100. 100 is best quality, 0 is lowest quality. Not relevant for .png outputs	`80`	min: 0, max: 100
`seed`	integer	Random seed. Set for reproducible generation	`—`	—

promptrequiredstring

Prompt for generated image

aspect_ratiostring

Aspect ratio for the generated image

Default: "1:1"

1:116:921:93:22:34:55:43:44:39:169:21

disable_safety_checkerboolean

Disable safety checker for generated images.

Default: false

go_fastboolean

Run faster predictions with model optimized for speed (currently fp8 quantized); disable to run in original bf16. Note that outputs will not be deterministic when this is enabled, even if you set a seed.

Default: true

lora_scalenumber

Determines how strongly the main LoRA should be applied. Sane results between 0 and 1 for base inference. For go_fast we apply a 1.5x multiplier to this value; we've generally seen good performance when scaling the base value by that amount. You may still need to experiment to find the best value for your particular lora.

Default: 1min: -1, max: 3

lora_weightsstring

Load LoRA weights. Supports Replicate models in the format <owner>/<username> or <owner>/<username>/<version>, HuggingFace URLs in the format huggingface.co/<owner>/<model-name>, CivitAI URLs in the format civitai.com/models/<id>[/<model-name>], or arbitrary .safetensors URLs from the Internet. For example, 'fofr/flux-pixar-cars'

megapixelsstring

Approximate number of megapixels for generated image

Default: "1"

10.25

num_inference_stepsinteger

Number of denoising steps. 4 is recommended, and lower number of steps produce lower quality outputs, faster.

Default: 4min: 1, max: 4

num_outputsinteger

Number of outputs to generate

Default: 1min: 1, max: 4

output_formatstring

Format of the output images

Default: "webp"

webpjpgpng

output_qualityinteger

Quality when saving the output images, from 0 to 100. 100 is best quality, 0 is lowest quality. Not relevant for .png outputs

Default: 80min: 0, max: 100

seedinteger

Random seed. Set for reproducible generation

Version: 83180e3ae073Updated: 7/25/20263.7M runs