f-2-klein-4b/text-to-image-lora

POST

/openapi/v2/rhart-image/f-2-klein-4b/text-to-image-lora

A 4-billion parameter ultra-fast text-to-image LoRA customization version from Black Forest Labs. As a derivative series of the professional-grade FLUX.2, Klein maintains near-top-tier generation quality through architectural optimization and distillation while significantly reducing hardware requirements and inference latency. This model supports loading custom LoRA adapters for personalized style injection. Open-source license allows commercial use, requiring only 13GB VRAM to run smoothly. Ideal for creators and small-to-medium teams needing rapid iteration of specific visual styles and brand consistency.

Request

Authorization

Header Params

Body Params application/jsonRequired

Example

{
    "9##text": "A beautiful girl, 29-35 years old, European-looking, kind, spontaneous, smiling, with long, thick, loose chestnut-colored hair (the hair has a slight reddish tint in the sun), riding a horse, in nature, a sandy landscape, the ocean is visible, and the girl and horse are visible in full growth, 85 mm lens, cinematic lighting, skin with pores and microtexture. ",
    "33##select": "8",
    "15##lora_name": "CHIZHICKLENB4(1).safetensors",
    "15##strength_model": 0
}

Request Code Samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location --request POST 'https://www.runninghub.ai/openapi/v2/rhart-image/f-2-klein-4b/text-to-image-lora' \
--header 'Authorization: Bearer [Your API KEY]' \
--header 'Authorization: Bearer [Your API KEY]' \
--header 'Content-Type: application/json' \
--data-raw '{
    "9##text": "A beautiful girl, 29-35 years old, European-looking, kind, spontaneous, smiling, with long, thick, loose chestnut-colored hair (the hair has a slight reddish tint in the sun), riding a horse, in nature, a sandy landscape, the ocean is visible, and the girl and horse are visible in full growth, 85 mm lens, cinematic lighting, skin with pores and microtexture. ",
    "33##select": "8",
    "15##lora_name": "CHIZHICKLENB4(1).safetensors",
    "15##strength_model": 0
}'

Responses

🟢200成功

application/json

Task result query endpoint: /openapi/v2/query

Body

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 2026-04-30 12:00:08

z-image/turbo

f-krea-dev-lora