# Wan | 2.5 | Preview | Image to Image

Wan 2.5 Preview Image to Image transforms an input photo into a new, high-quality image while preserving the main structure and enhancing details with realistic style.

## API Information

- **Model Slug:** wan-2-5-preview-image-to-image
- **Branded URL:** https://www.eachlabs.ai/alibaba/wan-2-5/wan-2-5-preview-image-to-image
- **Provider:** Alibaba
- **Category:** Image to Image
- **Output Type:** image
- **Status:** active
- **Base Cost:** $0.05 per image
- **Estimated Processing Time:** 75 seconds
- **Interactive Demo:** https://www.eachlabs.ai/ai-models/wan-2-5-preview-image-to-image

## Pricing

- **Charge Type:** dynamic
- **Estimate:** $0.05 per image
- **Pricing Details:** default: $0.05

## Input Schema

| Parameter | Type | Required | Default | Constraints | Description |
|-----------|------|----------|---------|-------------|-------------|
| prompt | string | Yes | - | - | Text instruction describing the desired editing operation. Supports Chinese and English. Max 1500 characters. |
| image_urls | array | Yes | - | - | Array of input image URLs (1-3). First image is the primary input; additional images are references. |
| negative_prompt | string | No | - | - | Text describing content to avoid in the generated image. Max 500 characters. |
| image_size | string | No | square_hd | square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9 | Output image size preset. square_hd: 1280x1280, square: 768x768, portrait_4_3: 960x1280, portrait_16_9: 720x1280, landscape_4_3: 1280x960, landscape_16_9: 1280x720. |
| num_images | integer | No | 1 | 1–4 | Number of images to generate. Range: 1-4. Each image is billed separately. |
| seed | integer | No | - | 1–2147483647 | Random seed for reproducibility. Range: 0-2147483647. If not provided, a random seed is chosen. |

## Example Request

```bash
curl -X POST https://api.eachlabs.ai/v1/prediction/ \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "wan-2-5-preview-image-to-image",
  "input": {
    "image_urls": [
      "https://cdn-us.eachlabs.ai/defaults/b3284fcc30ac11bea65797aad5dc919ff2bc86e1322e4ce2a3dfd9cd680c2ec0.png"
    ],
    "prompt": "Reimagine the scene during a gentle rain shower: clouds drape over the mountains, raindrops ripple across the river, and mist rises through the meadow of flowers, creating a soft, moody atmosphere."
  }
}'
```

## Output Schema

Response returned by `GET /v1/prediction/{id}` when the job completes:

```json
{
  "status": "success",
  "predictionID": "string",
  "output": "string (URL of generated image)",
  "metrics": {
    "predict_time": "number (seconds)"
  }
}
```

## Polling

```bash
curl https://api.eachlabs.ai/v1/prediction/{PREDICTION_ID} \
  -H "Authorization: Bearer YOUR_API_KEY"
```

| Status | Meaning |
|--------|---------|
| `processing` | Still running — poll again |
| `success` | Done — read `output` |
| `error` | Failed — read `message` / `details` |

## Webhook (alternative to polling)

Pass `"webhook_url": "https://your.host/path"` in the create request. Eachlabs POSTs this payload when the job ends:

```json
{
  "exec_id": "prediction-uuid",
  "status": "succeeded",
  "output": "https://...",
  "error": ""
}
```

`status` is `"succeeded"` or `"failed"`. `exec_id` equals the `predictionID` from create. Return 2xx within 30 seconds.

## Errors

Error body: `{ "status": "error", "message": "...", "details": "..." }`

| Code | Meaning |
|------|---------|
| `400` | Invalid input |
| `401` | Missing / invalid `Authorization` bearer token |
| `404` | Unknown model or prediction id |
| `429` | Rate limit — 100 creates / min, 10 concurrent per key |
| `5xx` | Retry with backoff |

## Overview

**wan-2-5-preview-image-to-image — Image-to-Image AI Model**

Developed by Alibaba as part of the **wan-2.5** family, **wan-2-5-preview-image-to-image** transforms input photos into enhanced, high-quality images while preserving core structure and adding realistic details. This **image-to-image AI model** excels in single-image editing and multi-image fusion, making it ideal for developers seeking an **Alibaba image-to-image** solution for precise visual refinements. Unlike generic editors, it maintains subject fidelity and layout integrity, delivering outputs in PNG format at resolutions up to 1080P for professional-grade results.

## Usage Notes

- API Base URL: `https://api.eachlabs.ai/v1`
- Authentication: send `Authorization: Bearer YOUR_API_KEY`. Generate a key from the Eachlabs dashboard at https://www.eachlabs.ai/dashboard/api-keys.
- File-typed parameters (`*_url`, `image_url`, `video_url`, `audio_url`, etc.) accept publicly-reachable HTTPS URLs only. Upload your asset first (GCS / S3 / your CDN) and pass the resulting URL. Data-URIs and localhost URLs are rejected.
- For structured parameters (arrays / objects) send real JSON values, not stringified payloads.
- Monetary values are reported in USD; per-token / per-megapixel rates may be billed in micro-cents internally.
- Prefer `webhook_url` over polling for long-running predictions — see the Webhook Callback section.