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Flux 3 Video

FLUX 3 is Black Forest Labs' leap from image specialists to multimodal foundation model - the first FLUX generation to jointly learn image, video, and audio in a unified architecture. Built on the company's Self-Flow technology, it generates video up to 20 seconds with native audio in a single pass, and it treats understanding and generation as one framework rather than two models bolted together.

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API DOCS / SIMPLIFIED

Integrate this model with one task-based API flow

FLUX 3 is Black Forest Labs' leap from image specialists to multimodal foundation model - the first FLUX generation to jointly learn image, video, and audio in a unified architecture. Built on the company's Self-Flow technology, it generates video up to 20 seconds with native audio in a single pass, and it treats understanding and generation as one framework rather than two models bolted together. The examples below are rendered from Flux 3 Video, the current gateway base URL, and the selected public model contract.

Input mode
X-API-Key on every request
POST /api/v1/openapi/task
GET /api/v1/openapi/task/status/{task_id}
Async task workflow

Single code window

Switch language once. Each example already includes both the task creation request and the task status polling request.

Unified Example
API_KEY="<API_KEY>"
BASE_URL="https://api.musespark.ai"
REQUEST_BODY='{
  "model_id": "flux-3-video",
  "parameters": {
    "prompt": "A cinematic drone shot over a futuristic city at sunrise, volumetric light, realistic motion",
    "resolution": "720p",
    "duration": 5,
    "aspect_ratio": "21:9",
    "batch_size": 1
  }
}'

CREATE_RESPONSE=$(curl --request POST "$BASE_URL/api/v1/openapi/task" \
  --header "X-API-Key: $API_KEY" \
  --header "Content-Type: application/json" \
  --data-raw "$REQUEST_BODY")

TASK_ID="<TASK_ID_FROM_CREATE_RESPONSE>"

curl "$BASE_URL/api/v1/openapi/task/status/$TASK_ID" \
  --header "X-API-Key: $API_KEY"

Request and response JSON become the documentation

Keep the payload and task status envelope as the primary contract. Field descriptions, optionality, and enum hints now live inline as JSON comments.

Request Body

Caller payload

This is the request envelope accepted by the public gateway for the selected model contract.

Field comments and caller parameters come directly from the current item's model schema.
{
"model_id": "flux-3-video",// target model
"parameters": {
"prompt": "A cinematic drone shot over a futuristic city at sunrise, volumetric light, realistic motion",// prompt describing the video to generate · min 1 · min length 1
"resolution": "720p",// output resolution. Supports 720p and 1080p · enum: 720p | 1080p
"duration": 5,// requested video duration in integer seconds, from 5 to 20. Video continuation may produce a shorter output than requested · min 5 · max 20
"aspect_ratio": "21:9",// output video aspect ratio · enum: 21:9 | 2:1 | 16:9 | 4:3 | 1:1 | 3:4 | 9:16 | Auto
"batch_size": 1// standard quantity control field. The allowed range for this item is 1-4 · min 1 · max 4
}
}
Response Body

Gateway response

This is the task status response you will query with task_id until the task reaches a terminal state.

Poll every 2-5 seconds and stop once status becomes completed, failed, cancelled.
{
"code": 200,// 200 on success
"msg": "success",
"data": {
"task_id": "task_01HQX8N2QJ0YQ8Q0T7G6N4V6K2",// use for status polling
"status": "completed",// enum: queued | running | completed | failed | cancelled
"progress": 100,// 0-100 if available
"completed_at": 1760000000,// unix timestamp
"expires_at": 1760001800,// unix timestamp
"result": {
"output_urls": [// generated files
"https://cdn.example.com/output.png"
]
}
}
}