# Kling O3 4K text to video

Takes prompt, shot type, multi prompt and more, all optional. Served by fal.ai.

Kling O3 4K, text to video, served by fal.ai. The OpenAPI schema for the fal-ai/kling-video/o3/4k/text-to-video queue. Price: $0.42 per second, audio included (5 s = $2.10). Asynchronous: returns a request_id; poll fal/status and fetch fal/result with model "fal-ai/kling-video" and that request_id. Billed once, when the result is ready; a generation that fails is refunded.

- Tool ID: `fal/kling-o3-4k-text-to-video`
- Name in the catalog: Kling O3 4K, text to video
- Provider: [fal.ai](/providers/fal.md)
- Capability: [Kling](/tools/video-generation/kling.md)
- Price: $0.42 per second
- Authentication: an authorised Agentik workspace is required for execution, including zero-price tools.

## Pricing contract

The provider’s price, with no markup. Billed for measured usage.


```json
{
  "model": "per_unit",
  "amountUsd": 0.42,
  "unitsField": "duration",
  "unitsDefault": 5,
  "maxUnits": 15
}
```

Pricing source: [https://fal.ai/models/fal-ai/kling-video/o3/4k/text-to-video](https://fal.ai/models/fal-ai/kling-video/o3/4k/text-to-video). $0.42 per second, audio included (5 s = $2.10)..

Price verification date: 2026-10-08.

## Complete input schema


```json
{
  "type": "object",
  "properties": {
    "prompt": {
      "type": "string",
      "maxLength": 2500,
      "description": "Text prompt for video generation. Required unless multi_prompt is provided.",
      "title": "Prompt"
    },
    "shot_type": {
      "enum": [
        "customize",
        "intelligent"
      ],
      "default": "customize",
      "type": "string",
      "title": "Shot Type",
      "description": "The type of multi-shot video generation. 'intelligent' lets the model automatically determine shot structure."
    },
    "multi_prompt": {
      "items": {
        "required": [
          "prompt"
        ],
        "x-fal-order-properties": [
          "prompt",
          "duration"
        ],
        "type": "object",
        "properties": {
          "prompt": {
            "type": "string",
            "title": "Prompt",
            "description": "The prompt for this shot."
          },
          "duration": {
            "enum": [
              "1",
              "2",
              "3",
              "4",
              "5",
              "6",
              "7",
              "8",
              "9",
              "10",
              "11",
              "12",
              "13",
              "14",
              "15"
            ],
            "default": "5",
            "type": "string",
            "title": "Duration",
            "description": "The duration of this shot in seconds"
          }
        },
        "title": "KlingV3MultiPromptElement"
      },
      "type": "array",
      "description": "List of prompts for multi-shot video generation.",
      "title": "Multi Prompt"
    },
    "aspect_ratio": {
      "enum": [
        "16:9",
        "9:16",
        "1:1"
      ],
      "default": "16:9",
      "type": "string",
      "title": "Aspect Ratio",
      "description": "Aspect ratio of the generated video."
    },
    "duration": {
      "description": "Video duration in seconds (3-15s).",
      "enum": [
        "3",
        "4",
        "5",
        "6",
        "7",
        "8",
        "9",
        "10",
        "11",
        "12",
        "13",
        "14",
        "15"
      ],
      "default": "5",
      "type": "string",
      "title": "Duration"
    },
    "generate_audio": {
      "description": "Whether to generate native audio for the video.",
      "default": false,
      "type": "boolean",
      "title": "Generate Audio"
    }
  },
  "additionalProperties": false
}
```

## Published example

This is the provider tool’s published example. Replace example values with the user’s requested inputs, respecting the schema; do not execute an example merely to test a connection.


```json
{
  "tool_id": "fal/kling-o3-4k-text-to-video",
  "input": {
    "prompt": "a red cube slowly rotating on a white table, soft studio light",
    "duration": "3",
    "aspect_ratio": "1:1",
    "generate_audio": false
  }
}
```

## Execute and retrieve

Inspect again before execution, explain the price and obtain the required authority. Use MCP run_tool or POST /v1/run with this tool ID, valid input and an idempotency key. Save the returned run ID and follow the actual state. If Agentik answers that the tool is temporarily unavailable, do not retry it blindly; use discovery to propose an alternative.

This tool uses deferred settlement. Follow its returned task/run instructions; preserve the existing reservation until the result is reconciled.

A partial or uncertain result can still have consumed provider resources. Consult [billing](/docs/billing.md), [idempotency](/docs/idempotency.md) and [asynchronous results](/docs/async.md).

[Provider documentation](https://fal.ai/models/fal-ai/kling-video/o3/4k/text-to-video)

[REST inspection](https://api.agentik.cc/v1/tools/fal/kling-o3-4k-text-to-video) · [OpenAPI](/openapi.json) · [Connection guide](/connect.md)

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[HTML page](/providers/fal/kling-o3-4k-text-to-video) · [Agent index](/llms.txt)