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Flux 1 SRPO

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 both personal and commercial use and is optimized for high-performance inference.

API Endpoint

POST https://image.siraya.pro/v1/images/generations

Request Parameters

Parameter Type Required Description
Authorization string Yes Your API Key (e.g., Bearer <API_KEY>).

Body

Parameter Type Default Description
model string - The model ID: flux-1-srpo-text-to-image.
prompt string - A text description of the image you want to generate.
size string landscape_4_3 The size of the generated image. Options: square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9.
num_inference_steps integer 28 The number of denoising steps for image generation.
guidance_scale number 4.5 Measures how closely the model sticks to the prompt.
acceleration string regular Speed of generation: none, regular, high.
seed integer - Use a specific seed for deterministic generation.
enable_safety_checker boolean false Enable/disable content safety filtering.
n integer 1 Number of images to generate.
output_format string url The output format, typically url.

[!TIP] For custom image sizes, you can pass an object to image_size with width and height properties instead of using the size preset.

Usage Examples

curl https://image.siraya.pro/v1/images/generations \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer <API_KEY>" \
  -d '{
    "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",
    "n": 1,
    "output_format": "url"
  }'

import requests

url = "https://image.siraya.pro/v1/images/generations"
headers = {
    "Content-Type": "application/json",
    "Authorization": "Bearer <API_KEY>"
}
data = {
    "model": "flux-1-srpo-text-to-image",
    "prompt": "A cute baby sea otter.",
    "size": "landscape_4_3",
    "n": 1
}

response = requests.post(url, headers=headers, json=data)
print(response.json())

Example Response

{
  "data": [
    {
      "url": "https://resource.siraya.pro/image/generated%2Fsiraya_f6889132-9398-4cae-be8e-15e7b4390d89.png",
      "b64_json": "",
      "revised_prompt": ""
    }
  ],
  "created": 1760772941
}