flux/srpo/image-to-image

This documentation is valid for the following list of our models:

• flux/srpo/image-to-image

Try in Playground

Model Overview

flux/dev/image-to-image model upgraded with Tencent’s SRPO technique.

Model	Generated image properties
flux/srpo/image-to-image	Format: JPEG, PNG Fixed size: Matches the dimensions of the reference image.

Setup your API Key

If you don’t have an API key for the AI/ML API yet, feel free to use our Quickstart guide.

API Schema

post

Body

application/json

modelstring · enumRequiredPossible values:

promptstring · max: 4000Required

The text prompt describing the content, style, or composition of the image to be generated.

num_imagesnumber · min: 1 · max: 4Optional

The number of images to generate.

Default: 1

seedinteger · min: 1Optional

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

num_inference_stepsinteger · min: 1 · max: 50Optional

The number of inference steps to perform.

Default: 40

guidance_scalenumber · min: 1 · max: 20Optional

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: 4.5

sync_modebooleanOptional

If set to true, the function will wait for the image to be generated and uploaded before returning the response. This will increase the latency of the function but it allows you to get the image directly in the response without going through the CDN.

Default: false

enable_safety_checkerbooleanOptional

If set to True, the safety checker will be enabled.

Default: true

output_formatstring · enumOptional

The format of the generated image.

Default: jpegPossible values:

accelerationstring · enumOptional

The speed of the generation. The higher the speed, the faster the generation.

Default: regularPossible values:

image_urlstring · uriRequired

The URL of the reference image.

strengthnumber · max: 1Optional

Determines how much the prompt influences the generated image.

Default: 0.95

Responses

200Success

application/json

post

/v1/images/generations

cURLJavaScriptPython

curl -L \
  --request POST \
  --url 'https://api.aimlapi.com/v1/images/generations' \
  --header 'Authorization: Bearer <YOUR_AIMLAPI_KEY>' \
  --header 'Content-Type: application/json' \
  --data '{
      "model": "flux/srpo/image-to-image",
      "prompt": "Add a crown to the T-rex’s head.",
      "image_url": "https://raw.githubusercontent.com/aimlapi/api-docs/main/reference-files/t-rex.png"
    }'

200Success

{
  "data": [
    {
      "url": "https://cdn.aimlapi.com/generations/hedgehog/1749730923700-29fe35d2-4aef-4bc5-a911-6c39884d16a8.png",
      "b64_json": null
    }
  ],
  "meta": {
    "usage": {
      "credits_used": 120000
    }
  }
}

Quick Example

Let's generate a new image using the one from the flux/dev Quick Example as a reference — and make a simple change to it with a prompt.

Python

import requests
import json  # for getting a structured output with indentation

def main():
    response = requests.post(
        "https://api.aimlapi.com/v1/images/generations",
        headers={
            # Insert your AIML API Key instead of <YOUR_AIMLAPI_KEY>:
            "Authorization": "Bearer <YOUR_AIMLAPI_KEY>",
            "Content-Type": "application/json",
        },
        json={
            "model": "flux/srpo/image-to-image",
            "prompt": "Add a bird to the foreground of the photo.",
            "image_url": "https://raw.githubusercontent.com/aimlapi/api-docs/main/reference-files/t-rex.png",
            "strength": 0.9
        }
    )

    data = response.json()
    print(json.dumps(data, indent=2, ensure_ascii=False))

if __name__ == "__main__":
    main()

JS

Response

{
  "images": [
    {
      "url": "https://v3b.fal.media/files/b/koala/1TOtgew8As_QBlCyKy4Z-.jpg",
      "width": 1024,
      "height": 768,
      "content_type": "image/jpeg"
    }
  ],
  "timings": {
    "inference": 0.947831045370549
  },
  "seed": 484902001,
  "has_nsfw_concepts": [
    false
  ],
  "prompt": "Add a bird to the foreground of the photo.",
  "data": [
    {
      "url": "https://v3b.fal.media/files/b/koala/1TOtgew8As_QBlCyKy4Z-.jpg",
      "width": 1024,
      "height": 768,
      "content_type": "image/jpeg"
    }
  ],
  "meta": {
    "usage": {
      "tokens_used": 52500
    }
  }
}

Reference Image	Generated Image