Kling Video V3

POST/v1/run

Kling Video V3 is KwaiVGI's unified video generation model. Generate or transform videos from prompts, images, reference videos, and multi-shot text while choosing standard or pro mode per request.

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/v3.

Default: kwaivgi/kling-video/v3

stringpromptrequired

Text prompt for video generation or transformation. When using reference media, refer to them as @Image1, @Image2, and @Video1.

Optional<string>resolution

Generation quality tier.

Allowed values: standard, pro, 4k

Default: standard

Optional<string>image

Optional first-frame image URL for image-to-video.

Optional<string>video

Optional reference video URL for video-to-video generation.

Optional<boolean>keep_original_sound

Request parameter supported by this model.

Default: true

Optional<string>character_orientation

Request parameter supported by this model.

Allowed values: image, video

Optional<string>end_image

Optional end-frame image URL for image-to-video.

Optional<array<string>>images

Optional reference image URLs.

Optional<integer>duration

Generated video duration in seconds.

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

Default: 5

Optional<string>aspect_ratio

Aspect ratio of the generated image.

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

Default: 16:9

Optional<boolean>generate_audio

Request parameter supported by this model.

Default: true

Optional<string>shot_type

Request parameter supported by this model.

Allowed values: customize, intelligent

Default: customize

Optional<array<object>>multi_prompt

Request parameter supported by this model.

Response Schema

The submit endpoint returns a run response. If its status is pending or running, poll GET /v1/run/{id} with the returned opaque ID until it reaches a terminal state.

stringidrequired

Opaque SandBase run identifier. Use it exactly as returned; no prefix is guaranteed.

stringstatusrequired

Current public run status.

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

Optional<string>model

Public SandBase model name used for this run.

Optional<array<object>>outputs

Present only for completed runs. Each object is capability-specific; inspect the selected model schema for its fields.

Optional<object>error

Present only for failed or timeout runs. Contains a public error type and sanitized message.

Optional<string>error.type

Stable public error category.

Optional<string>error.message

Sanitized error message safe to show to clients.

Optional<object>usage

Usage details when available.

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: text-to-video, image-to-video, video-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/v3",
  "prompt": "Based on @Video1, make the character from @Image1 dance.",
  "image": "https://static.sandbase.ai/examples/mirrored/f77b827ca02a-TNErq9yD7ZxGRATjfAqnh_EIgJSN67.png",
  "video": "https://static.sandbase.ai/examples/mirrored/f1ecbb471a16-hklvF__w53diz6Rve7f5__JuDW2xl0mr6sJ_Kjz3Vxe_vidoeook--1-_1.mp4",
  "duration": 5,
  "aspect_ratio": "16:9"
}'

# 2. If the response is still running, poll the returned id
curl https://api.sandbase.ai/v1/run/f3d2e8a1-7c4b-4a12-9d2e-123456789abc \
  -H "Authorization: Bearer $SANDBASE_API_KEY"

Response202 Accepted

{
  "id": "f3d2e8a1-7c4b-4a12-9d2e-123456789abc",
  "model": "kwaivgi/kling-video/v3",
  "status": "running"
}