Create Kling 4.0 video

POST

videos

curl --request POST \
  --url https://sigrunai.com/v1/videos \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "omni-10s",
  "prompt": "A golden retriever running across a sunny meadow, cinematic tracking shot",
  "aspect_ratio": "16:9"
}
'

{
  "code": 20000,
  "msg": "<string>",
  "data": {
    "task_id": "<string>",
    "status": "<string>",
    "progress": 123,
    "model": "<string>",
    "created_at": 123,
    "completed_at": 123,
    "cost": 123,
    "error_message": "<string>",
    "result": {
      "image_url": "<string>",
      "video_url": "<string>"
    }
  }
}

Asynchronously generate Kling 4.0 videos. Use the shared entry POST /v1/videos with model set to kling-4.0 (or a billing key). On success you get a task_id; poll Query video task and read result.video_url when completed.

Models

`model`	Notes	Duration	Resolution
`kling-4.0`	Open model name; pair with `resolution` for billing	5–30 s	`720p` (default) / `1080p`
`kling-4.0-720p`	Billing key: 720p	5–30 s	`720p`
`kling-4.0-1080p`	Billing key: 1080p	5–30 s	`1080p`

Billing is per_second. Billable seconds = output duration + sum of all reference video durations (ceil to whole seconds via reference_video_durations; reference audio duration is not billed). See the model catalog and the cost field on create for live unit prices.

Modes

Mode	Parameters
Text-to-video	Omit `images` / `videos` / `audios`, or pass empty arrays
Reference generation	Pass reference images, videos, and/or audios

First/last frame fields are not supported.

Reference limits

Type	Max count	Duration each	Max file size
Image	10	—	10MB
Video	5	≤ 30 s	50MB
Audio	3	5–30 s	20MB

Reference media must be public https:// URLs. File size is enforced on upload; durations are validated via reference_*_durations.

Request parameters

Field	Type	Required	Description
`model`	string	yes	`kling-4.0` / `kling-4.0-720p` / `kling-4.0-1080p`
`prompt`	string	yes	Generation prompt, 1–5000 characters
`duration` / `seconds`	int \| string	yes	5–30; string values allowed (e.g. `"10"`)
`aspect_ratio` / `ratio`	string	no	`16:9`, `9:16`, `1:1`; default `16:9`
`resolution`	string	no	`720p` (default) or `1080p`; also inferred from billing model names
`images` / `reference_images`	string[]	no	Reference image URLs, max 10
`videos` / `reference_videos`	string[]	no	Reference video URLs, max 5
`reference_video_durations`	int[]	conditional	Same length as `videos`, seconds (1–30); required when videos are present
`audios` / `reference_audios`	string[]	no	Reference audio URLs, max 3
`reference_audio_durations`	int[]	conditional	Same length as `audios`, seconds (5–30); required when audios are present

Examples

Text-to-video

curl -X POST 'https://sigrunai.com/v1/videos' \
  -H 'Authorization: Bearer sk_xxx' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "kling-4.0",
    "prompt": "A night drive through a neon city, cinematic tracking shot",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 8
  }'

Image + video + audio reference

curl -X POST 'https://sigrunai.com/v1/videos' \
  -H 'Authorization: Bearer sk_xxx' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "kling-4.0",
    "prompt": "Image 1 for product look; video 1 for camera motion; audio 1 for pacing",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 10,
    "images": ["https://example.com/ref.png"],
    "videos": ["https://example.com/ref.mp4"],
    "reference_video_durations": [5],
    "audios": ["https://example.com/ref.mp3"],
    "reference_audio_durations": [8]
  }'

Billable seconds in this example = 10 + 5 = 15 (audio is not added).

Response

Create returns the shared task payload (task_id, status, cost, …). data.model is the billing key (e.g. kling-4.0-720p). Poll the query endpoint for result.video_url when completed.

Authorizations

Authorization

string

header

required

控制台创建的 API Key，格式：Bearer sk_xxx

Body

application/json

model

string

required

omni-10s, veo3.1-fast, veo3.1-lite, veo3.1-lite-hd, grok-imagine-video-1.5 (and fast/lite), minimax-h3, minimax-h3-max, kling-4.0 / kling-4.0-720p / kling-4.0-1080p, seedance2.0-md, sd2-480p-ac, sd2-720p-ac, seedance2.5-30s, or sd2.5-720p-ac

Example:

"omni-10s"

prompt

string

required

duration

omni-10s: fixed 10; seedance2.0-md: 5/10/15; sd2-*-ac: 4–15; seedance2.5-30s: fixed 30; sd2.5-720p-ac: 4–30

seconds

Alias of duration

aspect_ratio

string

ratio

string

Alias of aspect_ratio

orientation

string

portrait/landscape may imply aspect ratio

size

string

resolution

string

omni-10s is fixed at 720p

first_image

string<uri>

First-frame URL for omni-10s frame mode

last_image

string<uri>

Last-frame URL for omni-10s; use with first_image

images

string<uri>[]

reference_images

string<uri>[]

videos

string<uri>[]

reference_videos

string<uri>[]

reference_video_durations

integer[]

Required with reference videos for kling-4.0; same length as videos; seconds 1–30. Billable seconds = output duration + sum of these values.

Required range: 1 <= x <= 30

reference_audio_durations

integer[]

Required with reference audios for kling-4.0; same length as audios; seconds 5–30 (validation only, not billed).

Required range: 5 <= x <= 30

audios

string<uri>[]

reference_audios

string<uri>[]

Response

200 - application/json

Submitted

code

integer

Example:

20000

msg

string

data

object

Show child attributes

Last modified on October 19, 2026

⌘I

curl --request POST \
  --url https://sigrunai.com/v1/videos \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "omni-10s",
  "prompt": "A golden retriever running across a sunny meadow, cinematic tracking shot",
  "aspect_ratio": "16:9"
}
'

{
  "code": 20000,
  "msg": "<string>",
  "data": {
    "task_id": "<string>",
    "status": "<string>",
    "progress": 123,
    "model": "<string>",
    "created_at": 123,
    "completed_at": 123,
    "cost": 123,
    "error_message": "<string>",
    "result": {
      "image_url": "<string>",
      "video_url": "<string>"
    }
  }
}

Gemini Omni

Veo 3.1

Grok Imagine Video

MiniMax H3

Kling 4.0

Seedance 2.0

Seedance 2.5

Create Kling 4.0 video

Models

Modes

Reference limits

Request parameters

Examples

Text-to-video

Image + video + audio reference

Response

Authorizations

Body

Response

​Models

​Modes

​Reference limits

​Request parameters

​Examples

​Text-to-video

​Image + video + audio reference

​Response

Authorizations

Body

Response

Models

Modes

Reference limits

Request parameters

Examples

Text-to-video

Image + video + audio reference

Response