Flux 1 Srpo

flux-1-srpo-text-to-image

post

FLUX.1 SRPO [dev] is a 12 billion parameter flow transformer that generates high-quality images from text with incredible aesthetics. It is suitable for personal and commercial use.

Header parameters

AuthorizationstringRequiredExample: sk-yOm1Vc3raDjQluBttyAwSdbVxtWFEAPCbtAZ2uF3yST1xNCY

Body

application/json

modelstringRequired

model is the model name

Example: flux-1-srpo-text-to-image

promptstringRequired

prompt is the prompt.

Example: A cute baby sea otter.

sizestring · enumOptional

The size of the generated image. Default value: landscape_4_3

Possible enum values: square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9

Note: For custom image sizes, you can pass the width and height as an object:

"image_size": {
  "width": 1280,
  "height": 720
}

Default: landscape_4_3Example: landscape_4_3Possible values:

num_inference_stepsintegerOptional

The number of inference steps to perform. Default value: 28

Default: 28Example: 28

guidance_scalenumberOptional

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show you. Default value: 4.5

Default: 4.5Example: 4.5

accelerationstring · enumOptional

The speed of the generation. The higher the speed, the faster the generation. Default value: "regular"

Possible enum values: none, regular, high

Default: regularExample: regularPossible values:

seedintegerOptional

The same seed and the same prompt given to the same version of the model will output the same image every time.

enable_safety_checkerbooleanOptional

If set to true, the safety checker will be enabled. Default value: false

Default: false

nintegerOptional

n is the number of images to generate, default value is 1.

Default: 1Example: 1

output_formatstring · enumOptional

output_format indicate the output format, default value is url.

Default: urlExample: urlPossible values:

Responses

200Success

application/json

post

/v1/images/generations

HTTPcURLJavaScriptPython

POST /v1/images/generations HTTP/1.1
Host: image.onerouter.pro
Authorization: text
Content-Type: application/json
Accept: */*
Content-Length: 232

{
  "model": "flux-1-srpo-text-to-image",
  "prompt": "A cute baby sea otter.",
  "size": "landscape_4_3",
  "num_inference_steps": 28,
  "guidance_scale": 4.5,
  "acceleration": "regular",
  "seed": 36,
  "enable_safety_checker": true,
  "n": 1,
  "output_format": "url"
}

200Success

{
  "data": [
    {
      "url": "https://resource.onerouter.pro/image/generated%2Fonerouter_f6889132-9398-4cae-be8e-15e7b4390d89.png",
      "b64_json": "",
      "revised_prompt": ""
    }
  ],
  "created": 1760772941
}