# Kling v2.1

> Kuaishou Kling v2.1 image-to-video model. Generate 5s and 10s videos in 720p (standard) or 1080p (pro) resolution. Pro mode supports end_image for frame-to-frame transitions.

- **Provider**: replicate
- **Model ID**: kwaivgi/kling-v2.1
- **Category**: video_generation
- **Credits**: 375 per request
- **Pricing Type**: input_based

## API Endpoint

Base URL: https://api.core.today/v1

### Create Prediction
POST /predictions

### Get Status
GET /predictions/{job_id}

### Cancel
DELETE /predictions/{job_id}

## Authentication

Header: `X-API-Key: YOUR_API_KEY`

## Input Parameters

- `mode` (string, optional): Standard is 720p, Pro is 1080p. Both are 24fps. (Default: `standard`; Options: `standard`, `pro`)
- `duration` (integer, optional): Duration in seconds (Default: `5`; Options: `5`, `10`)
- `end_image` (string, optional): Last frame of the video (pro mode only)
- `prompt` (string, **required**): Text prompt for video generation
- `negative_prompt` (string, optional): Things you do not want to see in the video
- `start_image` (string, **required**): First frame of the video (required)

## Example Request

```json
{
  "model": "kwaivgi/kling-v2.1",
  "input": {
    "mode": "standard",
    "duration": 5,
    "prompt": "a woman points at the words",
    "start_image": "https://replicate.delivery/xezq/rfKExHkg7L2UAyYNJj3p1YrW1M3ZROTQQXupJSOyM5RkwQcKA/tmpowaafuyw.png"
  }
}
```

## Response Format

```json
{
  "job_id": "abc123",
  "status": "pending",
  "provider": "replicate",
  "model": "black-forest-labs/flux-schnell",
  "created_at": "2026-01-01T00:00:00Z",
  "result": null,
  "error": null
}
```

Status values: `pending`, `processing`, `completed`, `failed`, `cancelled`

## Usage Flow

1. POST /predictions with model and input → receive job_id
2. Poll GET /predictions/{job_id} until status is `completed` or `failed`
3. Result contains output URL(s) or data

## Output Type

url

## Tags

kling, kuaishou, video-generation, image-to-video, 720p, 1080p, frame-transition

## Documentation

https://replicate.com/kwaivgi/kling-v2.1