## Basic model info

- Model name: kling/kling kling-v4
- Model description: Kling 4.0: up to 30-second native video with two-channel stereo audio and lip sync, from text, up to 10 keyframes, or up to 15 mixed references (images, videos, elements and voices), plus video editing. 720p and 1080p.
- Endpoint name: text-to-video


## Model schema

The model schema is defined in the OpenAPI schema: [OpenAPI Schema](https://oapi.sunra.ai/main/kling/kling-v4/latest.json)

### Model input schema

The model input schema is:



```json
{
  "properties": {
    "prompt": {
      "description": "Text prompt describing the video, including dialogue, sound and camera direction.",
      "maxLength": 26000,
      "minLength": 1,
      "title": "Prompt",
      "type": "string",
      "x-sr-order": 201
    },
    "aspect_ratio": {
      "default": "16:9",
      "description": "Aspect ratio of the generated video.",
      "enum": [
        "21:9",
        "16:9",
        "9:16",
        "1:1"
      ],
      "title": "Aspect Ratio",
      "type": "string",
      "x-sr-order": 401
    },
    "duration": {
      "default": 5,
      "description": "Duration of the generated video in seconds (3-30).",
      "maximum": 30,
      "minimum": 3,
      "title": "Duration",
      "type": "integer",
      "x-sr-order": 402
    },
    "resolution": {
      "default": "1080p",
      "description": "Output resolution. Pricing depends on resolution.",
      "enum": [
        "720p",
        "1080p"
      ],
      "title": "Resolution",
      "type": "string",
      "x-sr-order": 403
    }
  },
  "required": [
    "prompt"
  ],
  "title": "TextToVideoInput",
  "type": "object"
}
```



### Model output schema

The model output schema is:



```json
{
  "description": "Output for the omni endpoints, billed post-hoc on `units` (USD x 1000).",
  "properties": {
    "output_video_dur": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Output video duration in seconds as reported by Kling.",
      "title": "Output Video Dur"
    },
    "units": {
      "description": "Billable amount in thousandths of a USD (see pricing.py).",
      "title": "Units",
      "type": "integer"
    },
    "video": {
      "properties": {
        "content_type": {
          "description": "The mime type of the file.",
          "title": "Content Type",
          "type": "string"
        },
        "file_name": {
          "description": "The name of the file. It will be auto-generated if not provided.",
          "title": "File Name",
          "type": "string"
        },
        "file_size": {
          "description": "The size of the file in bytes.",
          "title": "File Size",
          "type": "integer"
        },
        "url": {
          "description": "The URL where the file can be downloaded from.",
          "title": "Url",
          "type": "string"
        }
      },
      "required": [
        "content_type",
        "file_name",
        "file_size",
        "url"
      ],
      "title": "SunraFile",
      "type": "object"
    }
  },
  "required": [
    "video",
    "units"
  ],
  "title": "KlingV4UnitsOutput",
  "type": "object"
}
```



## Example inputs and outputs

Use the following example inputs and outputs to understand the model.

### Input example



```json
{
  "prompt": "",
  "aspect_ratio": "16:9",
  "duration": 5,
  "resolution": "1080p"
}
```



### Output example



```json
{
}
```



## Model code examples

### JavaScript



```javascript
import { sunra } from "@sunra/client";

const result = await sunra.subscribe("kling/kling-v4/text-to-video", {
  input: {
  	prompt: '',
  	aspect_ratio: '16:9',
  	duration: 5,
  	resolution: '1080p'
  },
  logs: true,
  onQueueUpdate: (update) => {
    console.log(`Status Update: ${update.status}, Request ID: ${update.request_id}`);
  },
});
console.log(result.data);
console.log(result.requestId);
```



### Python



```python
import sunra_client

result = sunra_client.subscribe(
    "kling/kling-v4/text-to-video",
    arguments={
        "prompt": "",
        "aspect_ratio": "16:9",
        "duration": 5,
        "resolution": "1080p"
    },

    with_logs=True,
    on_enqueue=print,
    on_queue_update=print,
)
print(result)
```



### Java



```java
import ai.sunra.client.*;
import java.util.Map;
import com.google.gson.JsonObject;

var client = SunraClient.withEnvCredentials();

var response = client.subscribe(
    "kling/kling-v4/text-to-video",
    SubscribeOptions.<JsonObject>builder()
        .input(Map.of(
            "prompt", "",
            "aspect_ratio", "16:9",
            "duration", 5,
            "resolution", "1080p"))

        .resultType(JsonObject.class)
        .onQueueUpdate(update -> System.out.printf(
            "\nStatus Update: %s, Request ID: %s%n",
            update.getStatus(),
            update.getRequestId()
        ))
        .logs(true)
        .build()
);

System.out.println("Completed!");
System.out.println(response.getData());
  
```



### Kotlin



```kotlin
import ai.sunra.client.kt.*
import com.google.gson.JsonObject

val client = createSunraClient()

val response = client.subscribe<JsonObject>(
    endpointId = "kling/kling-v4/text-to-video",
    input = mapOf(
            "prompt" to "",
            "aspect_ratio" to "16:9",
            "duration" to 5,
            "resolution" to "1080p"),
    options = ai.sunra.client.kt.SubscribeOptions(logs = true),
    onUpdate = { update ->
        println("\nStatus Update: ${update.status}, Request ID: ${update.requestId}")
    }
)

println("Completed!")
println(response.data)
  
```



### Curl



```bash

curl --request POST \
  --url https://api.sunra.ai/v1/queue/kling/kling-v4/text-to-video \
  --header "Authorization: Key $SUNRA_KEY" \
  --header "Content-Type: application/json" \
  --data '{"prompt":"","aspect_ratio":"16:9","duration":5,"resolution":"1080p"}'
    
```



## Model readme

>