black-forest-labs/flux-pro

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State-of-the-art image generation with top of the line prompt following, visual quality, image detail and output diversity.

Capabilities

1:14:33:416:99:162:33:2Reference ImagesSeed

Cost

$0.050 / image

Input Parameters

Name	Type	Description	Default	Constraints
`prompt`*	string	Text prompt for image generation	`—`	—
`aspect_ratio`	string	Aspect ratio for the generated image	`"1:1"`	custom1:116:93:22:34:55:49:163:44:3
`guidance`	number	Controls the balance between adherence to the text prompt and image quality/diversity. Higher values make the output more closely match the prompt but may reduce overall image quality. Lower values allow for more creative freedom but might produce results less relevant to the prompt.	`3`	min: 2, max: 5
`height`	integer	Height of the generated image in text-to-image mode. Only used when aspect_ratio=custom. Must be a multiple of 32 (if it's not, it will be rounded to nearest multiple of 32). Note: Ignored in img2img and inpainting modes.	`—`	min: 256, max: 1440
`image_prompt`	string(uri)	Image to use with Flux Redux. This is used together with the text prompt to guide the generation towards the composition of the image_prompt. Must be jpeg, png, gif, or webp.	`—`	—
`interval`	number	Deprecated	`2`	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
`prompt_upsampling`	boolean	Automatically modify the prompt for more creative generation	`false`	—
`safety_tolerance`	integer	Safety tolerance, 1 is most strict and 6 is most permissive	`2`	min: 1, max: 6
`seed`	integer	Random seed. Set for reproducible generation	`—`	—
`steps`	integer	Deprecated	`25`	min: 1, max: 50
`width`	integer	Width of the generated image in text-to-image mode. Only used when aspect_ratio=custom. Must be a multiple of 32 (if it's not, it will be rounded to nearest multiple of 32). Note: Ignored in img2img and inpainting modes.	`—`	min: 256, max: 1440

promptrequiredstring

Text prompt for image generation

aspect_ratiostring

Aspect ratio for the generated image

Default: "1:1"

custom1:116:93:22:34:55:49:163:44:3

guidancenumber

Controls the balance between adherence to the text prompt and image quality/diversity. Higher values make the output more closely match the prompt but may reduce overall image quality. Lower values allow for more creative freedom but might produce results less relevant to the prompt.

Default: 3min: 2, max: 5

heightinteger

Height of the generated image in text-to-image mode. Only used when aspect_ratio=custom. Must be a multiple of 32 (if it's not, it will be rounded to nearest multiple of 32). Note: Ignored in img2img and inpainting modes.

min: 256, max: 1440

image_promptstring

Image to use with Flux Redux. This is used together with the text prompt to guide the generation towards the composition of the image_prompt. Must be jpeg, png, gif, or webp.

intervalnumber

Deprecated

Default: 2min: 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

prompt_upsamplingboolean

Automatically modify the prompt for more creative generation

Default: false

safety_toleranceinteger

Safety tolerance, 1 is most strict and 6 is most permissive

Default: 2min: 1, max: 6

seedinteger

Random seed. Set for reproducible generation

stepsinteger

Deprecated

Default: 25min: 1, max: 50

widthinteger

Width of the generated image in text-to-image mode. Only used when aspect_ratio=custom. Must be a multiple of 32 (if it's not, it will be rounded to nearest multiple of 32). Note: Ignored in img2img and inpainting modes.

min: 256, max: 1440

Version: ce4035b99fc7Updated: 7/25/202613.9M runs