# Kling 2.1 Pro API

> Kuaishou's Kling 2.1 Pro: image to video. By Kuaishou, on Revana $0.07 per second of video.

- Model id: `kling-2.1-pro`
- Kind: video
- Maker: Kuaishou
- Tasks: Image to video
- Durations: 5 s, 10 s
- Audio: silent only
- Routes: 1
- Status: live on the API
- Page: https://revana.si/models/kling-2.1-pro

## Price (per second of video, USD)

| Resolution | Price | Credits |
|---|---|---|
| standard | $0.07 | 7 |

100 credits = $1. Charged once, only for the route that succeeds; failed generations cost nothing.

## Request

POST https://api.revana.si/v1/generations with `Authorization: Bearer $REVANA_API_KEY`:

```json
{
  "model": "kling-2.1-pro",
  "input": {
    "prompt": "A slow dolly shot through a neon-lit night market in the rain, steam rising from food stalls",
    "image_url": "https://example.com/start-frame.jpg",
    "duration": 5
  }
}
```

Poll `GET /v1/generations/{id}` until `status` is `succeeded` or `failed`, then download `GET /v1/generations/{id}/content`. Full API: https://revana.si/llms.txt

## Similar models

- [Kling 2.6 Pro](https://revana.si/models/kling-2.6-pro.md): from $0.07 per second of video
- [Kling 3.0](https://revana.si/models/kling-3.0.md): from $0.09 per second of video
- [Kling 2.1 Master](https://revana.si/models/kling-2.1-master.md): from $0.20 per second of video
- [Kling 2.1 Standard](https://revana.si/models/kling-2.1-std.md): from $0.04 per second of video
- [Kling 2.5 Turbo Pro](https://revana.si/models/kling-2.5-turbo-pro.md): from $0.06 per second of video
- [Kling 2.6 Motion Control](https://revana.si/models/kling-2.6-motion-control.md): from $0.07 per second of video