Stable Avatar

POST/v1/run

Stable Avatar by stability-ai - advanced AI model for audio-to-video. Delivers high-quality results with fast inference, suitable for both creative and production workflows.

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 stability-ai/stable-avatar.

Default: stability-ai/stable-avatar

stringpromptrequired

The prompt to use for the video generation.

stringimagerequired

The URL of the image to use as a reference for the video generation.

Optional<string>audio

The URL of the audio to use as a reference for the video generation.

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

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: audio-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": "stability-ai/stable-avatar",
  "prompt": "A person is in a relaxed pose. As the video progresses, the character speaks while arm and body movements are minimal and consistent with a natural speaking posture. Hand movements remain minimal. Don't blink too often. Preserve background integrity matching the reference image's spatial configuration, lighting conditions, and color temperature.",
  "image": "https://static.sandbase.ai/examples/stability-ai/stable-avatar/input_image_0.png",
  "audio": "https://static.sandbase.ai/examples/stability-ai/stable-avatar/input_audio_1.mp3",
  "aspect_ratio": "21:9"
}'

# 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": "stability-ai/stable-avatar",
  "status": "running",
  "outputs": []
}