Generate Images Using Flux

Follow this recipes to generate images using the Flux model.

The guide will recreate the following functionality in the Web UI via API.

Sample Request

curl --request POST \
     --url https://cloud.leonardo.ai/api/rest/v1/generations \
     --header 'accept: application/json' \
     --header 'authorization: Bearer <YOUR_API_KEY>' \
     --header 'content-type: application/json' \
     --data '
{
  "modelId": "b2614463-296c-462a-9586-aafdb8f00e36",
  "contrast": 3.5,
  "prompt": "a photo of an orange cat playing with a tennis ball with the text FLUX",
  "num_images": 4,
  "width": 1024,
  "height": 1024,
  "styleUUID": "111dc692-d470-4eec-b791-3475abac4c46",
  "enhancePrompt": false
}
'

Sample Output

Required Parameters

• modelId

  Preset	Model	modelId
  Flux Speed	Flux Schnell	1dd50843-d653-4516-a8e3-f0238ee453ff
  Flux Precision	Flux Dev	b2614463-296c-462a-9586-aafdb8f00e36

• prompt - Text prompt to use for generation.

• contrast

  Contrast	Value
  Low	3
  Medium	3.5
  High	4

  Accepts [1.0, 1.3, 1.8, 2.5, 3, 3.5, 4, 4.5].

Supported Parameters

• enhancePrompt (Prompt Enhance)

  • Set to false for OFF.
  • Set to true for ON and specify enhancePromptInstruction: "INSTRUCTION_AS_STRING".

• height - Height input resolution.

• num_images - Number of images.

• styleUUID (Preset Style)

  Preset Style	UUID
  3D Render	debdf72a-91a4-467b-bf61-cc02bdeb69c6
  Acrylic	3cbb655a-7ca4-463f-b697-8a03ad67327c
  Anime General	b2a54a51-230b-4d4f-ad4e-8409bf58645f
  Creative	6fedbf1f-4a17-45ec-84fb-92fe524a29ef
  Dynamic	111dc692-d470-4eec-b791-3475abac4c46
  Fashion	594c4a08-a522-4e0e-b7ff-e4dac4b6b622
  Game Concept	09d2b5b5-d7c5-4c02-905d-9f84051640f4
  Graphic Design 3D	7d7c2bc5-4b12-4ac3-81a9-630057e9e89f
  Illustration	645e4195-f63d-4715-a3f2-3fb1e6eb8c70
  None	556c1ee5-ec38-42e8-955a-1e82dad0ffa1
  Portrait	8e2bc543-6ee2-45f9-bcd9-594b6ce84dcd
  Portrait Cinematic	4edb03c9-8a26-4041-9d01-f85b5d4abd71
  Ray Traced	b504f83c-3326-4947-82e1-7fe9e839ec0f
  Stock Photo	5bdc3f2a-1be6-4d1c-8e77-992a30824a2c
  Watercolor	1db308ce-c7ad-4d10-96fd-592fa6b75cc4

• ultra (Generation Mode - Ultra) - Set to true to turn on ultra.

• width - Width input resolution.

📘

Note

If using the seed parameter, the maximum seed number is 2147483638.

Cost

Please refer to the apiCreditCost in the API response.