Generate an image with FLUX 1.1 [pro] finetune with ultra mode.

Submits an image generation task with FLUX 1.1 [pro] finetune with ultra mode.

POST /v1/flux-pro-1.1-ultra-finetuned

Generate an image with FLUX 1.1 [pro] finetune with ultra mode.

cURL

curl --request POST \
  --url https://api.us1.bfl.ai/v1/flux-pro-1.1-ultra-finetuned \
  --header 'Content-Type: application/json' \
  --header 'x-key: <api-key>' \
  --data '
{
  "finetune_id": "my-finetune",
  "finetune_strength": 1.2,
  "prompt": "A beautiful landscape with mountains and a lake",
  "seed": 42,
  "aspect_ratio": "16:9",
  "safety_tolerance": 2,
  "output_format": "jpeg",
  "image_prompt": "<string>",
  "image_prompt_strength": 0.1,
  "prompt_upsampling": false,
  "webhook_url": "<string>",
  "webhook_secret": "<string>"
}
'

200

{
  "id": "<string>",
  "polling_url": "<string>",
  "cost": 123,
  "input_mp": 123,
  "output_mp": 123
}

Authorizations

x-key · string · header · required

Body

application/json

finetune_id · string · required

Name of the LoRA to use. For LoRAs from other organizations (public or shared), use the format 'org-id/lora-name'.

Example:

"my-finetune"

finetune_strength · number · default: 1.2

Strength of the fine-tuned model. 0.0 means no influence, 1.0 means full influence. Allowed values up to 2.0

Required range: 0 <= x <= 2

prompt · string | null · default: ""

The prompt to use for image generation.

Example:

"A beautiful landscape with mountains and a lake"

seed · integer | null

Optional seed for reproducibility. If not provided, a random seed will be used.

Example:

42

aspect_ratio · string · default: 16:9

Aspect ratio of the image between 21:9 and 9:21

safety_tolerance · integer · default: 2

Tolerance level for input and output moderation. Between 0 and 6, 0 being most strict, 6 being least strict.

Required range: 0 <= x <= 6

Example:

2

output_format · enum<string> | null · default: jpeg

Output format for the generated image. Can be 'jpeg', 'png', or 'webp'.

Available options: jpeg, png, webp

image_prompt · string | null

Optional image to remix in base64 format

image_prompt_strength · number · default: 0.1

Blend between the prompt and the image prompt

Required range: 0 <= x <= 1

prompt_upsampling · boolean · default: false

Whether to perform upsampling on the prompt. If active, automatically modifies the prompt for more creative generation

webhook_url · string<uri> | null

URL to receive webhook notifications

Required string length: 1 - 2083

webhook_secret · string | null

Optional secret for webhook signature verification

Response

200

application/json

Successful Response

AsyncResponse

AsyncWebhookResponse

id · string · required

polling_url · string · required

cost · number | null

Cost in credits for this request

input_mp · number | null

Input megapixels (2 decimal places)

output_mp · number | null

Output megapixels (2 decimal places)