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MODEL IDklingai:kling-video@3-4k
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Kling VIDEO 3.0 4K

Kling AI
by Kling AI

Kling VIDEO 3.0 4K is the 4K variant of Kling VIDEO 3.0 for text-to-video and image-to-video generation. It extends the 3.0 series from 720p Standard and 1080p Pro into 4K output while keeping the same multimodal strengths: native audio generation, multi-shot sequencing, element consistency, prompt-driven scene control, and stable temporal coherence across longer clips.

Kling VIDEO 3.0 4K

API Options

Platform-level options for task execution and delivery.

taskType

stringrequiredvalue: videoInference

Identifier for the type of task being performed

taskUUID

stringrequiredUUID v4

UUID v4 identifier for tracking tasks and matching async responses. Must be unique per task.

outputType

stringdefault: URL

Video output type.

Allowed values1 value

outputFormat

stringdefault: MP4

Specifies the file format of the generated output. The available values depend on the task type and the specific model's capabilities.

  • `MP4`: Widely supported video container (H.264), recommended for general use.
  • `WEBM`: Optimized for web delivery.
  • `MOV`: QuickTime format, common in professional workflows (Apple ecosystem).
Allowed values3 values

outputQuality

integermin: 20max: 99default: 95

Compression quality of the output. Higher values preserve quality but increase file size.

webhookURL

stringURI

Specifies a webhook URL where JSON responses will be sent via HTTP POST when generation tasks complete. For batch requests with multiple results, each completed item triggers a separate webhook call as it becomes available.

Learn more1 resource

deliveryMethod

stringdefault: async

Determines how the API delivers task results.

Allowed values1 value
Returns an immediate acknowledgment with the task UUID. Poll for results using getResponse. Required for long-running tasks like video generation.
Learn more1 resource

uploadEndpoint

stringURI

Specifies a URL where the generated content will be automatically uploaded using the HTTP PUT method. The raw binary data of the media file is sent directly as the request body. For secure uploads to cloud storage, use presigned URLs that include temporary authentication credentials.

Common use cases:

  • Cloud storage: Upload directly to S3 buckets, Google Cloud Storage, or Azure Blob Storage using presigned URLs.
  • CDN integration: Upload to content delivery networks for immediate distribution.
// S3 presigned URL for secure upload
https://your-bucket.s3.amazonaws.com/generated/content.mp4?X-Amz-Signature=abc123&X-Amz-Expires=3600

// Google Cloud Storage presigned URL
https://storage.googleapis.com/your-bucket/content.jpg?X-Goog-Signature=xyz789

// Custom storage endpoint
https://storage.example.com/uploads/generated-image.jpg

The content data will be sent as the request body to the specified URL when generation is complete.

safety

object

Content safety checking configuration for video generation.

Properties2 properties
safety » checkContent

checkContent

booleandefault: false

Enable or disable content safety checking.

safety » mode

mode

stringdefault: none

Safety checking mode for video generation.

Allowed values3 values
Disables checking.
Checks key frames.
Checks all frames.

ttl

integermin: 60

Time-to-live (TTL) in seconds for generated content. Only applies when outputType is URL.

includeCost

booleandefault: false

Include task cost in the response.

Inputs

Input resources for the task (images, audio, etc). These must be nested inside the inputs object.

inputs » frameImages

frameImages

array of strings or objectsmin items: 1max items: 2

List of frame-specific image inputs. Each item can be either a plain image input (UUID, URL, Data URI, or Base64) or an object with an image and a target position in the video.

Format 1: string[]
string

Image input (UUID, URL, Data URI, or Base64).

Format 2: object[]2 properties
inputs » frameImages » image

image

stringrequired

Image input (UUID, URL, Data URI, or Base64).

inputs » frameImages » frame

frame

object

Target frame position for the image. Supports first and last frame.

Allowed values4 values
First frame of the video.
Last frame of the video.
Frame index 0 (first frame).
Frame index -1 (last frame).
inputs » elements

elements

array of objectsmin items: 1max items: 3

Reusable asset elements for video generation. Each element can contain images, videos, or voices that are saved for reuse. Reference elements in the prompt using <<<element_1>>>, <<<element_2>>>, etc. in order.

Properties7 properties
inputs » elements » id

id

stringrequired

Unique identifier for this element. Use to create a new element or reference a previously created one.

inputs » elements » description

description

string

Description of the element.

inputs » elements » frontalImage

frontalImage

string

Frontal reference image for the element. Required when using image-based elements.

inputs » elements » images

images

array of stringsmin items: 1max items: 3

Reference images for the element. Up to 3 images. Requires frontalImage.

inputs » elements » videos

videos

array of stringsitems: 1

Reference video for the element. Cannot be combined with images or voices.

inputs » elements » voices

voices

array of stringsitems: 1

Voice audio for the element. Can only be combined with images, not videos.

inputs » elements » tags

tags

array of stringsmin items: 1

Classification tags for the element.

Core Parameters

Primary parameters that define the task output.

numberResults

integermin: 1max: 4default: 1

Number of results to generate. Each result uses a different seed, producing variations of the same parameters.

model

stringrequiredvalue: klingai:kling-video@3-4k

Identifier of the model to use for generation.

positivePrompt

stringmin: 2max: 2500

Text prompt describing elements to include in the generated output.

negativePrompt

stringmin: 2max: 2500

Prompt to guide what to exclude from generation. Ignored when guidance is disabled (CFGScale ≤ 1).

width

integerrequired*paired with height

Width of the generated media in pixels.

height

integerrequired*paired with width

Height of the generated media in pixels.

duration

integermin: 3max: 15step: 1default: 5

Length of the generated video in seconds. The total number of frames produced is determined by duration multiplied by the model's frame rate (fps).

Provider Settings

Parameters specific to this model provider. These must be nested inside the providerSettings.klingai object.

providerSettings » klingai » multiPrompt

multiPrompt

array of objectsmax items: 6

Sequential prompt segments for multi-shot generation. The sum of all segment durations must equal the root-level duration.

Properties2 properties
providerSettings » klingai » multiPrompt » prompt

prompt

stringrequiredmin: 2max: 2500

Text prompt describing the content for this segment.

providerSettings » klingai » multiPrompt » duration

duration

integerrequiredmin: 1

Duration in seconds for this segment.

providerSettings » klingai » shotType

shotType

stringvalue: intelligence

The type of shot to generate.

providerSettings » klingai » sound

sound

boolean

Enable native audio generation.

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