f-dev

POST

/openapi/v2/rhart-image/f-dev

A 12-billion parameter text-to-image model by Black Forest Labs using rectified flow transformer architecture. Distilled from FLUX.1 [pro] via guidance distillation, it achieves near-flagship quality with improved efficiency. Supports text-to-image, image-to-image, and inpainting modes up to 1536×1536 resolution.

Request

Authorization

Header Params

Body Params application/jsonRequired

Example

{
    "23##text": "A close-up of a very pretty woman with stunning green eyes, a defined cupid's bow, and long, straight hair, showcasing her flawless features and soft expression.\n",
    "43##select": "1",
    "48##file_type": "PNG"
}

Request Code Samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location 'https://www.runninghub.ai/openapi/v2/rhart-image/f-dev' \
--header 'Authorization: Bearer [Your API KEY]' \
--header 'Authorization: Bearer [Your API KEY]' \
--header 'Content-Type: application/json' \
--data '{
    "23##text": "A close-up of a very pretty woman with stunning green eyes, a defined cupid'\''s bow, and long, straight hair, showcasing her flawless features and soft expression.\n",
    "43##select": "1",
    "48##file_type": "PNG"
}'

Responses

🟢200成功

application/json

Task result query endpoint: /openapi/v2/query

Bodyapplication/json

Examples

Submit response exampleTask success response example

{
    "taskId": "2013508786110730241",
    "status": "RUNNING",
    "errorCode": "",
    "errorMessage": "",
    "results": null,
    "clientId": "f828b9af25161bc066ef152db7b29ccc",
    "promptTips": "{\"result\": true, \"error\": null, \"outputs_to_execute\": [\"4\"], \"node_errors\": {}}"
}

Modified at 2026-06-01 12:00:07

f-dev-lora

wan-2.5-preview/text-to-image