> ## Documentation Index
> Fetch the complete documentation index at: https://docs.qingbo.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Kling V4 Flash

> Asynchronous generation, accepted parameters, metered billing and real output examples

Model IDs: `kling-v4-flash`.

## Quick start

```bash theme={"system"}
curl https://api.qingbo.ai/v1/tasks \
  -H "Authorization: Bearer $WAVE_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: kling-v4-flash-example-001" \
  -d '{
    "model": "kling-v4-flash",
    "action": "generate",
    "prompt": "Warm sunset caustics move across an amber glass orb resting in a shallow reflecting pool, subtle camera glide, no text.",
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "duration": 3
}'
```

Poll the original task with [`GET /v1/tasks/{task_id}`](https://docs.qingbo.dev/en/api-reference/task/status). Check both `status` and `billing_status`. Output URLs are in `result.videos[0].url[]`; download them before expiration. A client timeout does not justify a new submission.

## Accepted parameters

| Parameter | Range |
| - | - |
| `action` | `generate` |
| `duration` | 3–20 integer seconds; default 10 |
| `resolution` | 720p; default 720p |
| `aspect_ratio` | `16:9` / `9:16`; default 16:9 |
| Image input | `image_urls` or `first_frame_image`, up to 10 images |
| `watermark` | Default false |

This release exposes text/image generation. Video editing, video references and extension are not yet exposed. Kling first-frame requests omit the upstream aspect ratio; framing follows the image.

## Billing

Reserve and bill the requested output duration at **$0.0964287/second**, 720p. A 3-second quote is approximately **$0.289288**. Video-input modes are not exposed and their fees are not added to ordinary generation.

## Real outputs

<video controls playsInline loop muted src="https://s3.qingbo.ai/qingbo-public/waveapi/site/assets/2026/11/a36bda00-e19c-474d-99f5-e94fb244f01e.mp4" />

Generated by the named models and archived for public display.


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