# Wan 2.2 I2V Fast - Core.Today AI API

> A very fast and cheap PrunaAI-optimized version of Alibaba's Wan 2.2 A14B image-to-video model. Turns a single still image plus a prompt into a short animated clip at 480p or 720p, with an optional frame-interpolation pass for smoother motion.

- **Provider**: Alibaba
- **Model ID**: wan-video/wan-2.2-i2v-fast
- **Category**: Video Generation
- **Credits**: 260 per output video (flat, not per-second) — 480p base 120, 480p+interpolate 150, 720p base 260, 720p+interpolate 340
- **Speed**: Fast
- **Quality**: Standard

## Features
- PrunaAI-optimized inference — fast and low-cost compared to the base Wan 2.2 model
- Image-to-video with optional last-frame conditioning for smoother transitions
- Optional 30 FPS frame interpolation (ffmpeg-based) for silkier motion
- 480p or 720p output, flat per-video pricing (not per-second)
- LoRA support on both the high-noise and low-noise transformers

## Use Cases
- Quick social media clips animated from a single product or portrait photo
- Low-cost previews before committing to a higher-tier video model
- Batch-animating a large set of still images cheaply
- Smooth transition shots using a start and last frame
- Prototyping motion styles with custom LoRA weights

## API Endpoint

Base URL: https://api.core.today/v1
Create Prediction: POST /predictions
Get Status: GET /predictions/{job_id}

## Authentication
Header: X-API-Key: YOUR_API_KEY

## Input Parameters

### Required
- **prompt**: string - Prompt for video generation
- **image**: string - Input image to generate video from

### Optional
- **last_image**: string - Optional last image to condition the video generation for smoother transitions
- **resolution**: string (default: 480p) - Resolution of video: 16:9 is 832x480px, 9:16 is 480x832px
  Options: 480p, 720p
- **interpolate_output**: boolean (default: false) - Interpolate the generated video to 30 FPS using ffmpeg (raises price)
- **num_frames**: integer (default: 81) - Number of video frames (81 gives the best results)
- **frames_per_second**: integer (default: 16) - Frames per second. Pricing is based on duration at 16 fps
- **go_fast**: boolean (default: true) - Go fast (faster inference, no price change)
- **sample_shift**: number (default: 12) - Sample shift factor
- **seed**: integer - Random seed. Leave blank for random
- **disable_safety_checker**: boolean (default: false) - Disable safety checker for generated video
- **lora_weights_transformer**: string - LoRA weights URL for the HIGH-noise transformer (.safetensors)
- **lora_scale_transformer**: number (default: 1) - How strongly the transformer LoRA is applied
- **lora_weights_transformer_2**: string - LoRA weights URL for the LOW-noise transformer_2 (.safetensors)
- **lora_scale_transformer_2**: number (default: 1) - How strongly the transformer_2 LoRA is applied

## Examples

### 480p Base Animation
Fast, low-cost image-to-video at the default 480p resolution
```json
{
  "model": "wan-video/wan-2.2-i2v-fast",
  "input": {
    "image": "https://replicate.delivery/pbxt/NRvtedaIOd3pdE0pTE3L9uavxJ53g33THGr0HF81M2olNOce/replicate-prediction-g8gbs3rbk9rme0crbhwatpsq04.jpg",
    "prompt": "Close-up shot of an elderly sailor wearing a yellow raincoat, seated on the deck of a catamaran, slowly puffing on a pipe. His cat lies quietly beside him with eyes closed, enjoying the calm. The warm glow of the setting sun bathes the scene, with gentle waves lapping against the hull and a few seabirds circling slowly above. The camera slowly pushes in, capturing this peaceful and harmonious moment.",
    "resolution": "480p",
    "go_fast": true
  }
}
```

### 720p with Interpolation
Higher resolution output with 30 FPS interpolation for smoother motion
```json
{
  "model": "wan-video/wan-2.2-i2v-fast",
  "input": {
    "image": "https://replicate.delivery/pbxt/NRvtedaIOd3pdE0pTE3L9uavxJ53g33THGr0HF81M2olNOce/replicate-prediction-g8gbs3rbk9rme0crbhwatpsq04.jpg",
    "prompt": "The same scene, but the camera slowly pulls back to reveal the full catamaran sailing into the sunset",
    "resolution": "720p",
    "interpolate_output": true
  }
}
```

## Response Format
```json
{
  "job_id": "abc123",
  "status": "pending | processing | completed | failed",
  "result": "URL or data (when completed)"
}
```

## Usage Flow
1. POST /predictions with model and input -> receive job_id
2. GET /predictions/{job_id} -> poll until status is completed or failed
3. Result contains output URL(s)

## Tips
- Pricing is per output video, not per second — duration is controlled by num_frames, not billed separately
- interpolate_output raises the price about 30% (480p: 75→98, 720p: 165→218) — use it only for the final render
- 720p costs roughly 2.2x 480p — prototype prompts and framing at 480p first
- 81 frames gives the best quality according to the model card; going higher rarely helps
- go_fast keeps inference speed high without any price impact, so leave it enabled

## Documentation
https://replicate.com/wan-video/wan-2.2-i2v-fast