1. f
RunningHub-API
  • Log of Update
  • Getting Started
    • Instructions for Use
    • About nodeInfoList
    • About Enterprise ComfyUI API
    • Native ComfyUI API Integration Guide
    • API Error Code Reference
  • Quick Create
    • About Quick Create Invocation
    • Obtain quick create - model library style parameter data
    • Initiate Quick Create Task
  • Integration Example
    • Complete integration example
    • Complete Integration Example – Advanced Edition
    • Task Progress Display Example
    • Full Workflow Integration Example
  • Standard Model API
    • Video Generation & Processing
      • image-to-video
        • Vidu
          • Vidu-image-to-video-q3-pro-fast
          • Vidu-start-end-to-video-q3-pro-fast
          • Vidu-start-end-to-video-q2-turbo
          • Vidu-start-end-to-video-q2-pro
          • Vidu-image-to-video-q2-pro
          • Vidu-image-to-video-q2-turbo
          • Vidu-image-to-video-q3-pro
          • Vidu-image-to-video-q2-pro-fast
          • Vidu-start-end-to-video-q2-pro-fast
          • Vidu-image-to-video-q3-turbo
          • Vidu-start-end-to-video-q3-turbo
          • Vidu-start-end-to-video-q3-pro
        • kling
          • kling-v3.0-pro-image-to-video
          • kling-video-o3-pro/reference-to-video
          • kling-video-o1/image-to-video
          • kling-v3.0-std-image-to-video
          • kling-video-o3-std/reference-to-video
          • kling-video-o1/start-to-end
          • kling-video-o3-pro-image-to-video
          • kling-video-o3-std-image-to-video
          • kling-elements
          • kling-v2.5-turbo-std/image-to-video
          • kling-v2.5-turbo-pro/image-to-video
          • kling-v2.6-pro-image-to-video
        • wan
          • wan-2.7/image-to-video
          • wan-2.2/image-to-video
          • wan-2.6-reference-to-video
          • wan-2.6-reference-to-video-flash
          • wan-2.6-image-to-video-flash
          • wan-2.2-video/start-to-end
        • alibaba
          • wan
            • alibaba/wan-2.6/image-to-video
        • seedance
          • seedance-2.0/image-to-video
          • seedance-2.0-fast/image-to-video
          • seedance-v1.5-pro-image-to-video-fast
          • seedance-v1.5-pro-image-to-video
        • hailuo
          • hailuo-02-i2v-standard
          • hailuo-02-standard
          • hailuo-2.3/i2v-standard
          • hailuo-2.3-fast/image-to-video
          • hailuo-2.3-fast-pro/image-to-video
          • hailuo-2.3/i2v-pro
          • hailuo-02-i2v-pro
          • hailuo-02-fast
        • midjourney
          • midjourney-image-to-video
        • sora
          • sora-2/image-to-video-channel-low-price
          • sora-2/image-to-video-pro-official-stable
          • sora-2/image-to-video-pro-channel-low-price
          • sora-2/text-to-video-pro-official-stable
          • sora-2/image-to-video-realistic-official-stable
          • sora-2/image-to-video-official-stable
          • sora-2/image-to-video-channel-low-price
          • sora-2/image-to-video-pro-channel-low-price
        • xai
          • grok
            • xai/grok-imagine/image-to-video-channel-low-price
            • xai/grok-imagine/image-to-video-official-stable
        • google
          • veo3.1
            • google/veo3.1-pro/start-end-to-video-channel-low-price
            • google/veo3.1-fast/image-to-video-channel-low-price
            • google/veo3.1-fast/image-to-video-official-stable
            • google/veo3.1-pro/image-to-video-official-stable
            • google/veo3.1-fast/start-end-to-video-channel-low-price
            • google/veo3.1-pro/reference-to-video-official-stable
        • skyreels
          • skyreels-v4/image-to-video
        • ltx
          • ltx-2.3/image-to-video
          • ltx-2.3/image-to-video-lora
        • pixverse
          • pixverse-v6/image-to-video
      • reference-to-video
        • wan-2.7-reference-to-video
        • skyreels-v3/reference-to-video
        • Vidu-reference-to-video-q3
        • seedance-2.0/multimodal-video
        • Vidu-reference-to-video-q2
        • seedance-2.0-fast/multimodal-video
        • kling-video-o1-std/refrence-to-video
        • seedance-v1-lite-reference-to-video
        • skyreels-v4/omni-reference
        • Vidu-reference-to-video-q3-mix
      • text-to-video
        • Vidu
          • Vidu-text-to-video-q3-pro-fast
          • Vidu-text-to-video-q2
          • Vidu-text-to-video-q3-pro
          • Vidu-text-to-video-q3-turbo
        • kling
          • kling-video-o3-std-text-to-video
          • kling-video-o1/text-to-video
          • kling-v3.0-pro-text-to-video
          • kling-v3.0-std-text-to-video
          • kling-video-o3-pro-text-to-video
          • kling-v2.5-turbo-pro/text-to-video
          • kling-v2.6-pro-text-to-video
        • alibaba
          • wan
            • alibaba/wan-2.6/text-to-video
        • seedance
          • seedance-2.0/text-to-video
          • seedance-2.0-fast/text-to-video
          • seedance-v1.5-pro-text-to-video-fast
          • seedance-v1.5-pro-text-to-video
        • hailuo
          • hailuo-02-t2v-standard
          • hailuo-02-pro
          • hailuo-2.3-t2v-standard
          • hailuo-2.3-t2v-pro
          • hailuo-02-t2v-pro
        • sora
          • sora-2/text-to-video-channel-low-price
          • sora-2/text-to-video-pro-channel-low-price
          • sora-2/text-to-video-official-stable
          • sora-2/text-to-video-channel-low-price
          • sora-2/text-to-video-pro-channel-low-price
        • xai
          • grok
            • xai/grok-imagine/text-to-video-channel-low-price
            • xai/grok-imagine/text-to-video-official-stable
        • google
          • veo3.1
            • google/veo3.1-pro/text-to-video-channel-low-price
            • google/veo3.1-pro/text-to-video-official-stable
            • google/veo3.1-fast/video-extend-official-stable
            • google/veo3.1-pro/video-extend-official-stable
            • google/veo3.1-fast/text-to-video-channel-low-price
            • google/veo3.1-fast/text-to-video-official-stable
        • cinematic
          • cinematic-video-generator
        • wan
          • wan-2.7/text-to-video
          • wan-2.2/text-to-video
        • skyreels
          • skyreels-v4/text-to-video
        • ltx
          • ltx-2.3/text-to-video
          • ltx-2.3/text-to-video-lora
        • pixverse
          • pixverse-v6/text-to-video
      • video-edit
        • wan-2.7/video-edit
        • kling-video-o3-pro/video-edit
        • kling-video-o3-std/video-edit
        • kling-video-o1-std/edit-video
        • xai/grok-imagine/edit-video-official-stable
      • motion-control
        • kling-v3.0-pro-motion-control
        • kling-v3.0-std-motion-control
        • kling-v2.6-pro-motion-control
        • bytedance/dreamactor-v2
        • kling-v2.6-std-motion-control
      • video-tools
        • sora-upload-character-official
        • pixverse-v6/extend
        • pixverse-v6/transition
        • sora-upload-character-channel-low-price
        • rh-video-upscaler
        • rh-video-fps-increaser
      • video-effects
        • skyreels-v3/video-restyling
      • video-extend
        • wan-2.7/video-extend
        • skyreels-v3/single-shot-video-extension
        • skyreels-v3/shot-switching-video-extension
      • audio-to-video
        • kling-lip-sync/identify-face
        • kling-lip-sync/lip-sync-video
    • 3D Generation & Processing
      • text-to-3D
        • hunyuan3d-v3.1/text-to-3d
      • image-to-3D
        • hitem3d-v15/image-to-3d
        • hunyuan3d-v3.1/image-to-3d
        • hitem3d-v2/image-to-3d
        • hitem3d-v15/multi-image-to-3d
        • hitem3d-v2/multi-image-to-3d
        • hitem3d-portrait-v21/image-to-3d
        • hitem3d-portrait-v21/multi-image-to-3d
        • hitem3d-portrait-v20/image-to-3d
        • hitem3d-portrait-v20/multi-image-to-3d
        • hitem3d-portrait-v15/image-to-3d
        • hitem3d-portrait-v15/multi-image-to-3d
    • Audio Generation & Processing
      • text-to-audio
        • minimax/speech-2.8-hd
        • minimax/music-2.5
        • minimax/speech-02-hd
        • minimax/speech-02-turbo
        • minimax/speech-2.6-hd
        • minimax/speech-2.6-turbo
        • minimax/speech-2.8-turbo
        • minimax/voice-clone
        • kling-lip-sync/tts
    • Image Generation & Processing
      • reference-to-image
        • Vidu-reference-to-video-q2-pro
      • image-to-image
        • midjourney
          • midjourney-text-to-image-niji6
          • midjourney-text-to-image-v61
          • midjourney-text-to-image-v6
          • midjourney-text-to-image-v7
        • seedream
          • seedream-v4.5/image-to-image
          • seedream-v4/image-to-image
          • seedream-v5-lite/image-to-image
        • nano
          • nano-banana2-gemini31flash/image-to-image-channel-low-price
          • nano-banana-pro/edit-channel-low-price
          • nano-banana2-gemini31flash/image-to-image-official-stable
          • nano-banana/edit-channel-low-price
          • nano-banana/edit-official-stable
          • nano-banana-pro/edit-ultra-official-stable
          • nano-banana-pro/edit-official-stable
        • gpt
          • gpt-image-1.5/edit-channel-low-price
        • grok
          • grok-image/image-to-image/channel-low-price
        • qwen
          • qwen-image/edit-2511-lora
          • qwen-image/edit-2511
          • qwen-image-2.0-pro/image-edit
          • qwen-image-2.0/image-edit
        • z
          • z-image-turbo/image-to-image-lora
          • z-image-turbo/image-to-image
        • wan
          • wan-2.2/image-to-image
        • f
          • f-kontext-dev-lora
          • f-2-dev/edit-lora
          • f-2-dev/edit
          • f-2-klein-9b/edit
          • f-2-klein-4b/edit
          • f-2-klein-4b/edit-lora
      • text-to-image
        • midjourney
          • midjourney-text-to-image-niji7
        • nano
          • nano-banana-pro/text-to-image-channel-low-price
          • nano-banana2-gemini31flash/text-to-image-official-stable
          • nano-banana/text-to-image-channel-low-price
          • nano-banana-pro/text-to-image-ultra-official-stable
          • nano-banana2-gemini31flash/text-to-image-channel-low-price
          • nano-banana-pro/text-to-image-official-stable
          • nano-banana/text-to-image-official-stable
        • gpt
          • gpt-image-1.5/text-to-image-official-stable
          • gpt-image-1.5/text-to-image-channel-low-price
          • gpt-image-1.5/image-to-image-official-stable
        • seedream
          • seedream-v4.5/text-to-image
          • seedream-v5-lite/text-to-image
          • seedream-v4/text-to-image
        • grok
          • grok-image/text-to-image/channel-low-price
        • qwen
          • qwen-image/text-to-image-2512
          • qwen-image/text-to-image-2512-lora
          • qwen-image-2.0/text-to-image
          • qwen-image-2.0-pro/text-to-image
        • z
          • z-image/turbo-lora
          • z-image/turbo
        • wan
          • wan-2.2/text-to-image-lora
          • wan-2.7/text-to-image-pro
          • wan-2.7/text-to-image
        • f
          • f-krea-dev-lora
            POST
          • f-dev-lora
            POST
          • f-2-dev/text-to-image-lora
            POST
          • f-2-dev/text-to-image
            POST
          • f-2-klein-9b/text-to-image-lora
            POST
          • f-2-klein-9b/text-to-image
            POST
          • f-2-klein-4b/text-to-image
            POST
          • f-2-klein-4b/text-to-image-lora
            POST
          • f-dev
            POST
      • image-tools
        • wan-2.7/image-edit-pro
        • wan-2.7/image-edit
    • Other
      • pixverse-v5.6/text-to-video
      • pixverse-v5.6/image-to-video
  • Task Query & webhook
    • Check Task Status
    • Check Task Output
    • Get Webhook Event Details
    • Resend Specific Webhook Event
    • Query generation result (V2)
  • ComfyUI Workflows
    • Start ComfyUI Task 1 - Basic
    • Start ComfyUI Task 2 - Advanced
    • Get Workflow JSON
    • Cancel ComfyUI Task
  • AI App
    • Start AI App Task
    • Get API call examples for AI application
  • Resource Upload
    • 文件上传(新)
    • Upload Resource(image\video\audio\Compressed Files)
    • Upload Lora
  • Get Account Information
    POST
  • Schemas
    • Get Workflow JSON Request
    • TaskRunWebappByKeyRequest
    • Generate task submission results
    • Get Workflow JSON Response
    • Start ComfyUI Task Request 1
    • Start ComfyUI Task Request 2
    • Start ComfyUI Task Request -webhook
    • Start ComfyUI Task Response
    • TaskCreateResponse
    • Check Task Status Request
    • Node Input Information
    • Get Account Information Request
    • Upload Resource Request
    • Get Webhook Event Details Request
    • Resend Specific Webhook Request
    • R?
    • RWorkflowDuplicateResponse
    • RAccountStatusResponse
    • WorkflowDuplicateResponse
    • AccountStatusResponse
    • WorkflowDuplicateRequest
    • ApiUploadLoraRequest
    • RString
    • RTaskUploadResponse
    • TaskUploadResponse
  1. f

f-2-klein-9b/text-to-image

POST
/openapi/v2/rhart-image/f-2-klein-9b/text-to-image
A 9-billion parameter ultra-fast text-to-image model 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. Applications cover real-time creative design, social media content generation, rapid UI/UX prototyping, game art previews, educational visualization, and other fields—particularly suitable for interactive applications requiring low latency and cost-friendly hardware.

Request

Authorization
Header Params

Body Params application/jsonRequired

Example
{
    "36##text": "At dawn, a magnificent ancient Chinese pavilion stands by the tranquil misty lakeside. A beautiful young woman, dressed in elegant and flowing traditional Hanfu, is gracefully playing the guqin. Soft green willow branches sway in the breeze, and pale pink peach blossoms slowly drift through the air.",
    "51##select": "1",
    "35##value": 1024,
    "34##value": 1024,
    "54##file_type": "PNG"
}

Request Code Samples

Shell
JavaScript
Java
Swift
Go
PHP
Python
HTTP
C
C#
Objective-C
Ruby
OCaml
Dart
R
Request Request Example
Shell
JavaScript
Java
Swift
curl --location --request POST 'https://www.runninghub.ai/openapi/v2/rhart-image/f-2-klein-9b/text-to-image' \
--header 'Authorization: Bearer [Your API KEY]' \
--header 'Authorization: Bearer [Your API KEY]' \
--header 'Content-Type: application/json' \
--data-raw '{
    "36##text": "At dawn, a magnificent ancient Chinese pavilion stands by the tranquil misty lakeside. A beautiful young woman, dressed in elegant and flowing traditional Hanfu, is gracefully playing the guqin. Soft green willow branches sway in the breeze, and pale pink peach blossoms slowly drift through the air.",
    "51##select": "1",
    "35##value": 1024,
    "34##value": 1024,
    "54##file_type": "PNG"
}'

Responses

🟢200成功
application/json
Task result query endpoint: /openapi/v2/query
Body

Examples
{
    "taskId": "2013508786110730241",
    "status": "RUNNING",
    "errorCode": "",
    "errorMessage": "",
    "results": null,
    "clientId": "f828b9af25161bc066ef152db7b29ccc",
    "promptTips": "{\"result\": true, \"error\": null, \"outputs_to_execute\": [\"4\"], \"node_errors\": {}}"
}
Modified at 2026-03-28 04:00:16
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