Happy Horse Text to Video

POST/v1/run

Alibaba's #1-ranked Happy Horse 1.0 generates stunning 1080p videos with synchronized native audio and multilingual lip-sync, transforming text prompts or images into cinematic, true-to-life motion content for next-generation AIGC creation.

Request body

Submit an async generation request. The model field selects the model; other fields are model-specific input parameters.

stringmodelrequired

Model identifier. Set to alibaba/happy-horse/text-to-video.

Default: alibaba/happy-horse/text-to-video

stringpromptrequired

The text prompt to generate a video from.

Default: Shot 3 (over the shoulder, 3.5-5s): The camera glides slowly over his shoulder down onto the open book, his thumb gently turning a single page, soft window light falling across the paper, shallow depth of field on his hand.

Optional<integer>duration

The duration of the generated video in seconds.

Allowed values: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15

Default: 5

Optional<string>aspect_ratio

The aspect ratio of the generated video.

Allowed values: 16:9, 9:16, 1:1, 4:3, 3:4

Default: 16:9

Optional<string>resolution

The resolution of the video to generate.

Allowed values: 720p, 1080p

Default: 720p

Optional<integer>seed

Random seed for reproducible results. Set to -1 for random seed.

Response Schema

The submit endpoint returns an accepted generation task. Poll the result endpoint with the returned id for terminal outputs or errors.

Optional<string>error

Error message if the task failed. Empty on success.

stringidrequired

Unique identifier for the generation task.

Optional<string>model

Model ID used for the prediction.

Optional<array>outputs

Array of generated content. Empty when status is not completed.

stringstatusrequired

Status of the task: pending, running, completed, failed, or timeout.

Allowed values: pending, running, completed, failed, timeout

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: text-to-video

stringexecution_moderequired

Execution mode declared by the model registry.

Default: async

# 1. Submit a generation request
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "alibaba/happy-horse/text-to-video",
  "prompt": "Shot 3 (over the shoulder, 3.5-5s): The camera glides slowly over his shoulder down onto the open book, his thumb gently turning a single page, soft window light falling across the paper, shallow depth of field on his hand.",
  "duration": 5,
  "aspect_ratio": "16:9"
}'

# 2. If the response is still running, poll the returned id
curl https://api.sandbase.ai/v1/run/run_abc123 \
  -H "Authorization: Bearer $SANDBASE_API_KEY"

Response202 Accepted

{
  "id": "run_abc123",
  "model": "alibaba/happy-horse/text-to-video",
  "status": "running",
  "outputs": []
}