# KwaiVGI Kling V3 4K Image to Video API

> Kling V3 4K Image to Video by Kuaishou animates a start image, optionally toward an end image, into a 3-15 second native 4K video with optional native audio.

Source: https://www.sandbase.ai/model/kwaivgi/kling-video/v3/4k/image-to-video
API reference: https://www.sandbase.ai/model/kwaivgi/kling-video/v3/4k/image-to-video/docs

## Facts

- Provider: KwaiVGI
- Type: Video model
- Model ID: `kwaivgi/kling-video/v3/4k/image-to-video`
- Price: From $1.47 per run (30% off list price)
- Capabilities: image to video
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Unified Run API: `POST https://api.sandbase.ai/v1/run`

```bash
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "kwaivgi/kling-video/v3/4k/image-to-video",
  "image": "https://static.sandbase.ai/examples/kwaivgi/mirrored/example_inputs/kling-v3/pro-i2v/start_image.png",
  "prompt": "The craftsman slowly examines the bowl, turning it gently in his weathered hands. His eyes reflect years of wisdom. Subtle smile forms on his face. Dust particles drift in warm light. Breathing motion, blinking eyes.",
  "duration": 12,
  "shot_type": "customize",
  "generate_audio": true
}'
```

The response returns a run id; poll `GET https://api.sandbase.ai/v1/run/{id}` until the status is `completed` or `failed`.

## FAQ

### How do I call KwaiVGI Kling V3 4K Image to Video through SandBase?

Create a SandBase API key, then send requests with the model ID "kwaivgi/kling-video/v3/4k/image-to-video" to Unified Run API (/v1/run) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### Do I need a separate KwaiVGI account?

No. One SandBase API key and balance gives you access to KwaiVGI Kling V3 4K Image to Video and the other models in the catalog; you do not need to sign up with KwaiVGI separately.

## README

### Kling V3 4K Image to Video

Kling V3 4K image-to-video: `image` anchors the first frame, `end_image` optionally the last, with native audio and multi-shot control. Output is native 4K.

#### Fields

| Field | Type | Default | Notes |
|---|---|---|---|
| `prompt` | string, required | — | Up to 2,500 characters. |
| `image` | image URL, required | — | First frame. JPEG, PNG, or WebP URL. |
| `end_image` | image URL | — | Optional last frame. |
| `duration` | 3–15 | 5 | Output length in seconds. |
| `generate_audio` | boolean | true | Generate native audio with the clip. |
| `shot_type` | `customize` / `intelligent` | `customize` | `customize` follows your `multi_prompt` shot list; `intelligent` lets the model plan the cuts. |
| `multi_prompt` | object[] | — | Optional list of shots, each with its own prompt and duration. |

#### Billing

You pay $0.42 per output second, with or without audio.

| Output | Price |
|---|---|
| 3s | $1.26 |
| 5s (default) | $2.10 |
| 10s | $4.20 |
| 15s | $6.30 |

Failed runs are not charged.

#### Prompting

- Describe subject, action, camera move, and light in order.
- For several shots, use `multi_prompt` with one entry per shot.

#### Limits

- Clips are 3–15 seconds.

#### Also on SandBase

Other Kling V3 4K endpoints and tiers: `kwaivgi/kling-video/v3/4k/text-to-video`, `kwaivgi/kling-video/v3/standard/image-to-video`, `kwaivgi/kling-video/v3/pro/image-to-video`.