# Alibaba Wan 2.7 Reference to Video API

> Alibaba Wan 2.7 reference-to-video model generating video guided by reference content.

Source: https://www.sandbase.ai/models/alibaba/wan/2.7/reference-to-video
API reference: https://www.sandbase.ai/models/alibaba/wan/2.7/reference-to-video/docs

## Facts

- Provider: Alibaba
- Type: Video model
- Model ID: `alibaba/wan/2.7/reference-to-video`
- Price: From $0.50 per run
- Capabilities: reference to video
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Unified Run API: `POST https://api.sandbase.ai/v1/run`

```bash
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "alibaba/wan/2.7/reference-to-video",
  "images": [
    "https://static.sandbase.ai/examples/alibaba/wan/2.6/reference-to-video/flash/input_images_0.png"
  ],
  "prompt": "A golden retriever puppy running through a field of wildflowers in slow motion, ears flapping, tongue out, soft backlight",
  "duration": 5,
  "resolution": "720p"
}'
```

The response returns a run id; poll `GET https://api.sandbase.ai/v1/run/{id}` until the status is `completed` or `failed`.

## FAQ

### How do I call Alibaba Wan 2.7 Reference to Video through SandBase?

Create a SandBase API key, then send requests with the model ID "alibaba/wan/2.7/reference-to-video" to Unified Run API (/v1/run) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### Do I need a separate Alibaba account?

No. One SandBase API key and balance gives you access to Alibaba Wan 2.7 Reference to Video and the other models in the catalog; you do not need to sign up with Alibaba separately.

## README

### Wan 2.7 Reference to Video

Cast people, products, or characters from reference images (and optional reference videos) into a new scene. The prompt directs what they do; Wan 2.7 keeps their appearance consistent and supports several referenced characters interacting in one shot.

#### Fields

| Field | Type | Default | Notes |
|---|---|---|---|
| `prompt` | string, required | — | Up to 50,000 characters. |
| `images` | image URL[], required | — | Reference images, referred to in the prompt as Image 1, Image 2, … |
| `videos` | video URL[] | — | Optional reference clips, referred to as Video 1, Video 2, … |
| `duration` | 2–15 | 5 | Output length in seconds. |
| `aspect_ratio` | `16:9` / `9:16` / `1:1` / `4:3` / `3:4` | — | Output frame shape. |
| `resolution` | `720p` / `1080p` | `720p` | Sets the per-second rate. |
| `seed` | integer | random | Fix it to compare prompt changes. |

#### Billing

You pay for output seconds: $0.10 at 720p and $0.15 at 1080p, the same as Alibaba's list price. When you send reference `videos`, 5 seconds of input are added to the billed length.

| Output | 720p | 1080p |
|---|---|---|
| 5s, images only | $0.50 | $0.75 |
| 5s, with reference video | $1.00 | $1.50 |
| 10s, images only | $1.00 | $1.50 |
| 15s, images only | $1.50 | $2.25 |

Failed runs are not charged.

#### Prompting

- Give every reference a role: “Image 1 is the chef, Image 2 is the kitchen, Video 1 sets the camera move”.
- Numbering follows array order, so reordering `images` changes what “Image 2” means.
- Keep each reference image to one clear subject.

#### Limits

- The output is a new clip; to change an existing video use `alibaba/wan/2.7/video-edit`.

#### Also on SandBase

Other Wan 2.7 endpoints: `alibaba/wan/2.7/text-to-video`, `alibaba/wan/2.7/image-to-video`, `alibaba/wan/2.7/video-edit`, `alibaba/wan/2.7/video-extend`, `alibaba/wan/3.0/video` (newer, up to 30s).