Kling Video O3 4k

POST/v1/run

Kling Video O3 4k by KwaiVGI - animate still images into dynamic videos with AI. Transform photos into cinematic clips with natural motion, camera movement, and optional audio generation.

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 kwaivgi/kling-video/o3/4k/reference-to-video.

Default: kwaivgi/kling-video/o3/4k/reference-to-video

stringpromptrequired

Text prompt for video generation. Either prompt or multi_prompt must be provided, but not both.

stringimagerequired

Image to use as the first frame of the video.

Optional<array<string>>images

Reference images for style/appearance. Reference in prompt as @Image1, @Image2, etc. Maximum 7 total (elements + reference images) is allowed.

Optional<string>end_image

Image to use as the last frame of the video.

Optional<integer>duration

Video duration in seconds (3-15s).

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

Default: 5

Optional<boolean>generate_audio

Whether to generate native audio for the video.

Default: false

Optional<array<object>>multi_prompt

List of prompts for multi-shot video generation.

Optional<string>shot_type

The type of multi-shot video generation. 'intelligent' lets the model automatically determine shot structure.

Allowed values: customize, intelligent

Default: customize

Optional<string>aspect_ratio

The aspect ratio of the generated image.

Allowed values: 16:9, 9:16, 1:1

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": "kwaivgi/kling-video/o3/4k/reference-to-video",
  "prompt": "@Element1 and @Element2 enters the scene from two sides. Elephant starts to play with the ball",
  "image": "https://static.sandbase.ai/examples/mirrored/d5f4a0f0f119-NaslJIC7F2WodS6DFZRRJ.png",
  "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": "kwaivgi/kling-video/o3/4k/reference-to-video",
  "status": "running",
  "outputs": []
}