PixVerse V4.5 Transition

POST/v1/run

V4.5 Transition is PixVerse's image-to-video AI model. Bring static images to life with fluid animation, consistent character motion, and professional-grade video output.

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 pixverse/v4.5/transition.

Default: pixverse/v4.5/transition

stringpromptrequired

The prompt for the transition

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>end_image

URL of the image to use as the last frame

Optional<string>resolution

The resolution of the generated video

Allowed values: 360p, 540p, 720p, 1080p

Default: 720p

Optional<integer>duration

The duration of the generated video in seconds

Allowed values: 5, 8

Default: 5

Optional<integer>seed

The same seed and the same prompt given to the same version of the model will output the same video every time.

Optional<string>first_image_url

URL of the image to use as the first frame

Optional<string>style

The style of the generated video

Allowed values: anime, 3d_animation, clay, comic, cyberpunk

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: image-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": "pixverse/v4.5/transition",
  "prompt": "Scene slowly transition into cat swimming under water",
  "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": "pixverse/v4.5/transition",
  "status": "running",
  "outputs": []
}