Developer docs
Docs Replicate official format /replicate/v1/models/black-forest-labs/flux-1.1-pro-ultra/predictions
API reference

Create task black-forest-labs/flux-1.1-pro-ultra

Official documentation: https://replicate.com/black-forest-labs/flux-1.1-pro-ultra

POST/replicate/v1/models/black-forest-labs/flux-1.1-pro-ultra/predictions

Body Parametersapplication/json

input object

Input content

properties
aspect_ratio string

The aspect ratio of the generated image, default value: "1:1".

image_prompt_strength number

A mix between prompts and image prompts. Minimum value: 0, maximum value: 1.

output_format string

The format of the output image. Default value: "jpg".

prompt* string

Image-generated text prompts.

raw boolean

Produces less processed, more natural images. Default value: false.

safety_tolerance integer

Safety tolerance. 1 is the strictest and 6 is the loosest. Default value: 2.

Responses

200 application/json
response-200 object
properties
input* object

Input content

400 Bad request or validation failed application/json
response-400 object
properties
error* object
401 Missing or invalid API Key application/json
response-401 object
Request Body Example
1{
2"input": {
3"aspect_ratio": "3:2",
4"image_prompt_strength": 0.1,
5"output_format": "jpg",
6"prompt": "a majestic snow-capped mountain peak bathed in a warm glow of the setting sun",
7"raw": false,
8"safety_tolerance": 2
9}
10}
Code Sample cURL
1curl -X POST "https://api.digislash.com/replicate/v1/models/black-forest-labs/flux-1.1-pro-ultra/predictions" \
2-H "Authorization: Bearer <API Key>" \
3-H "Content-Type: application/json" \
4-d '{
5"input": {
6"aspect_ratio": "3:2",
7"image_prompt_strength": 0.1,
8"output_format": "jpg",
9"prompt": "a majestic snow-capped mountain peak bathed in a warm glow of the setting sun",
10"raw": false,
11"safety_tolerance": 2
12}
13}'
Response
1▼{
2"created_at": "2025-07-29T05:45:44.464Z",
3"data_removed": false,
4"id": "brgfcps121rm80crajvr2x4jg4",
5▼"input": {
6"aspect_ratio": "3:2",
7"image_prompt_strength": 0.1,
8"output_format": "jpg",
9"prompt": "a majestic snow-capped mountain peak bathed in a warm glow of the setting sun",
10"raw": false,
11"safety_tolerance": 2
12},
13"logs": "",
14"model": "black-forest-labs/flux-1.1-pro-ultra",
15"status": "starting",
16▼"urls": {
17"cancel": "https://api.replicate.com/v1/predictions/brgfcps121rm80crajvr2x4jg4/cancel",
18"get": "https://api.replicate.com/v1/predictions/brgfcps121rm80crajvr2x4jg4",
19"stream": "https://stream.replicate.com/v1/files/bcwr-bx7iokgbhtcqohbyy7i5lnli25grd3mhcljqvwxliud4o7ov7mgq",
20"web": "https://replicate.com/p/brgfcps121rm80crajvr2x4jg4"
21},
22"version": "hidden"
23}