# KwaiVGI Kling O3 Pro Image to Video API

> Kling O3 Pro Image to Video by Kuaishou animates a start image, optionally toward an end image, into a 3-15 second 1080p video with optional native audio.

Source: https://www.sandbase.ai/model/kwaivgi/kling-video/o3/pro/image-to-video
API reference: https://www.sandbase.ai/model/kwaivgi/kling-video/o3/pro/image-to-video/docs

## Facts

- Provider: KwaiVGI
- Type: Video model
- Model ID: `kwaivgi/kling-video/o3/pro/image-to-video`
- Price: From $0.39 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/o3/pro/image-to-video",
  "image": "https://static.sandbase.ai/examples/mirrored/0ff4703452ec-8ABMp4n9rh3kfD2Rq8fHd_start_frame.png",
  "prompt": "The character walks forward slowly, with the camera following from behind.",
  "duration": 10,
  "end_image": "https://static.sandbase.ai/examples/alibaba/qwen-image-edit-plus-lora-gallery/add-background/output_url_1.png",
  "shot_type": "customize",
  "generate_audio": false
}'
```

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 O3 Pro Image to Video through SandBase?

Create a SandBase API key, then send requests with the model ID "kwaivgi/kling-video/o3/pro/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 O3 Pro Image to Video and the other models in the catalog; you do not need to sign up with KwaiVGI separately.

## README

### Kling O3 Pro Image to Video

Kling O3 Pro image-to-video, the quality-first O3 tier. `image` anchors the first frame and an optional `end_image` sets the last; the prompt directs action and camera over 3–15 seconds.

#### 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 | false | Generate native audio with the clip. |
| `multi_prompt` | object[] | — | Optional list of shots, each with its own prompt and duration. |
| `shot_type` | `customize` / `intelligent` | `customize` | `customize` follows your `multi_prompt` shot list; `intelligent` lets the model plan the cuts. |

#### Billing

You pay for output seconds: $0.112 without audio and $0.14 with `generate_audio`.

| Output | Without audio | With audio |
|---|---|---|
| 3s | $0.336 | $0.42 |
| 5s (default) | $0.56 | $0.70 |
| 10s | $1.12 | $1.40 |
| 15s | $1.68 | $2.10 |

Failed runs are not charged.

#### Prompting

- Describe what moves, not what is already visible.
- With two frames, describe the transition between them.

#### Limits

- Clips are 3–15 seconds.

#### Also on SandBase

Other Kling O3 Pro endpoints and tiers: `kwaivgi/kling-video/o3/pro/text-to-video`, `kwaivgi/kling-video/o3/pro/reference-to-video`, `kwaivgi/kling-video/o3/pro/edit`, `kwaivgi/kling-video/o3/pro/video-to-video`, `kwaivgi/kling-video/o3/standard/image-to-video`, `kwaivgi/kling-video/o3/4k/image-to-video`.