# Wan 2.5 I2V Fast

> Alibaba Wan 2.5 image-to-video model optimized for speed. Supports audio synchronization for voice/music and prompt expansion.

- **Provider**: replicate
- **Model ID**: wan-video/wan-2.5-i2v-fast
- **Category**: video_generation
- **Credits**: 510 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

- `duration` (integer, optional): Duration in seconds (Default: `5`)
- `image` (string, **required**): Input image for video generation
- `seed` (integer, optional): Random seed for reproducibility
- `negative_prompt` (string, optional): Elements to avoid in the video
- `audio` (string, optional): Audio file (wav/mp3, 3-30s, ≤15MB) for voice/music synchronization
- `prompt` (string, **required**): Text prompt for video generation
- `resolution` (string, optional): Video resolution (Default: `720p`; Options: `720p`, `1080p`)
- `enable_prompt_expansion` (boolean, optional): Enable prompt optimizer (Default: `True`)

## Example Request

```json
{
  "model": "wan-video/wan-2.5-i2v-fast",
  "input": {
    "duration": 5,
    "image": "https://replicate.delivery/pbxt/NlipM5kTtzpwksahd7EBVcdWfDrmgfRyoHEPS0g9U5Ug5wcV/image.png",
    "prompt": "Food truck in snow serving hot ramen",
    "resolution": "720p",
    "enable_prompt_expansion": true
  }
}
```

## 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

wan, alibaba, video-generation, image-to-video, audio-sync, fast, 1080p

## Documentation

https://replicate.com/wan-video/wan-2.5-i2v-fast