Seedance 1.0 Pro Fast T2V

POST/v1/run

Seedance 1.0 Pro is Bytedance's text-to-video AI model. Turn written scripts and prompts into professional-quality video clips with realistic motion, lighting, and scene composition.

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 bytedance/seedance/1.0/pro/fast/text-to-video.

Default: bytedance/seedance/1.0/pro/fast/text-to-video

stringpromptrequired

The text prompt used to generate the video

Optional<string>aspect_ratio

The aspect ratio of the generated image.

Allowed values: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16

Optional<string>resolution

Video resolution - 480p for faster generation, 720p for balance, 1080p for higher quality

Allowed values: 480p, 720p, 1080p

Default: 1080p

Optional<integer>duration

Duration of the video in seconds

Allowed values: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

Default: 5

Optional<integer>seed

Random seed to control video generation. Use -1 for random.

Optional<boolean>camera_fixed

Whether to fix the camera position

Default: false

Optional<integer>num_frames

The number of frames to generate. If provided, will override duration.

Range: 29 to 289

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": "bytedance/seedance/1.0/pro/fast/text-to-video",
  "prompt": "Inside a quiet dojo, a martial artist moves with precision and grace. The performance highlights the beauty and discipline inherent in the ancient practice. Each form unfolds clearly, a testament to dedication and skill.",
  "aspect_ratio": "21:9",
  "duration": 5
}'

# 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": "bytedance/seedance/1.0/pro/fast/text-to-video",
  "status": "running",
  "outputs": []
}