Video

Kling 4.0 (T2V)

Credit-based pricing. Supports audio generation.

Try Kling 4.0 (T2V) →Compare models

Output

video

Aspect ratio

16:9, 9:16, 1:1, 21:9

Resolution

720p, 1080p

Duration

3s, 4s, 5s, 6s, 7s, 8s, 9s, 10s, 11s, 12s, 13s, 14s, 15s, 16s, 17s, 18s, 19s, 20s, 21s, 22s, 23s, 24s, 25s, 26s, 27s, 28s, 29s, 30s

Inputs

Generates audio

Example prompt

A detective stands on a rainy rooftop at night. The camera slowly pushes toward her as distant traffic and rainfall fill the scene.

Try this prompt →

LLM-ready

API & LLM schema

Exact request contract for this model. Agents can fetch it from /api/v1/models?id=kling/v4/text-to-video.

POST/api/v1/generate11 fields · 1 required

Field	Type	Requirement	Contract
`model_id`	constant	Required	ArtEmotion model identifier.
`extra`	object	Optional	Model-specific settings may also be nested here.
`max_credits`	number	Optional	Reject before submission if the estimated list price exceeds this cap. · Range: 1–…
`webhook_url`	string	Optional	Format: uri
`webhook_secret`	string	Optional	Optional model input.
`folder_id`	string	Optional	Optional model input.
`prompt`	string	Optional	Optional model input.
`multi_prompt`	array<object>	Optional	Optional JSON shots: [{"prompt":"A slow camera push","duration":5}]. Each prompt allows 512 characters. Total shot length must be 3–30 seconds and determines the credit estimate.
`duration`	number	Optional	Allowed: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30
`resolution`	string	Optional	Allowed: 720p, 1080p
`aspect_ratio`	string	Optional	Allowed: 16:9, 9:16, 1:1, 21:9

Minimal request example

{
  "model_id": "kling/v4/text-to-video"
}

Raw JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.artemotion.ai/api/v1/models?id=kling%2Fv4%2Ftext-to-video",
  "title": "Kling 4.0 (T2V) generation request",
  "description": "Request body accepted by POST /api/v1/generate for kling/v4/text-to-video.",
  "type": "object",
  "properties": {
    "model_id": {
      "type": "string",
      "const": "kling/v4/text-to-video",
      "description": "ArtEmotion model identifier."
    },
    "extra": {
      "type": "object",
      "additionalProperties": true,
      "description": "Model-specific settings may also be nested here."
    },
    "max_credits": {
      "type": "number",
      "minimum": 1,
      "description": "Reject before submission if the estimated list price exceeds this cap."
    },
    "webhook_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048
    },
    "webhook_secret": {
      "type": "string",
      "maxLength": 512
    },
    "folder_id": {
      "type": "string"
    },
    "prompt": {
      "type": "string",
      "maxLength": 26000
    },
    "multi_prompt": {
      "title": "Shot List",
      "description": "Optional JSON shots: [{\"prompt\":\"A slow camera push\",\"duration\":5}]. Each prompt allows 512 characters. Total shot length must be 3–30 seconds and determines the credit estimate.",
      "type": "array",
      "items": {
        "type": "object"
      }
    },
    "duration": {
      "type": "number",
      "enum": [
        3,
        4,
        5,
        6,
        7,
        8,
        9,
        10,
        11,
        12,
        13,
        14,
        15,
        16,
        17,
        18,
        19,
        20,
        21,
        22,
        23,
        24,
        25,
        26,
        27,
        28,
        29,
        30
      ]
    },
    "resolution": {
      "type": "string",
      "enum": [
        "720p",
        "1080p"
      ]
    },
    "aspect_ratio": {
      "type": "string",
      "enum": [
        "16:9",
        "9:16",
        "1:1",
        "21:9"
      ]
    }
  },
  "required": [
    "model_id"
  ],
  "additionalProperties": false
}

Browse schemas for every ArtEmotion model →

FAQ

How much does Kling 4.0 (T2V) cost on ArtEmotion?

Credit-based pricing. You pay in ArtEmotion credits — every plan and top-up converts USD to credits at a fixed rate.

Do I get my credits back if Kling 4.0 (T2V) fails?

Yes — failed generations are never charged. The credits are released back to your balance automatically.

Can I call Kling 4.0 (T2V) from the API?

Yes. Use POST /api/v1/generate with model_id: "kling/v4/text-to-video". See the API reference for the full schema.

Where are my generations stored?

Every output is saved to your personal Library. You can export or delete everything any time from Privacy & deletion.

Ready to generate with Kling 4.0 (T2V)?

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No commitment. New accounts get 50 free credits on signup. See pricing.