# Vidu Q3 Mix API (Shengshu)

> Vidu Q3 Mix turns up to 7 reference images — characters, products, places — into 3–15 second 720p or 1080p videos with audio, keeping every subject consistent.

Page: https://cheapergen.com/models/shengshu/vidu-q3-mix · API reference: https://cheapergen.com/models/shengshu/vidu-q3-mix/api

## Pricing
Official list price source: Vidu API list price for viduq3-mix at $0.005 per credit (720p 24 credits = $0.12 / s, 1080p 29 = $0.145; audio included). Prices verified 2026-10-16.

| Tier | Official | Cheaper Gen. | Save |
|---|---|---|---|
| 720p | $0.1200/s | $0.1100/s | 8% |
| 1080p | $0.1450/s | $0.1320/s | 9% |

## Specs
- Resolutions: 720p · 1080p
- Duration: 3–15 s
- Aspect ratios: 16:9 · 9:16 · 1:1 · 4:3 · 3:4
- References: 1–7 images

## Endpoints

### Reference to Video — `POST https://cheapergen.com/api/v1/run/shengshu/vidu-q3-mix/reference-to-video`

| Param | Type | Required | Description |
|---|---|---|---|
| prompt | string | yes | Describe the shot: subject, action, camera movement, lighting and style. |
| reference_image_urls | string[] (URLs) | yes | Up to 7 images for characters, products, style or scene. Refer to them in the prompt as @Image1, @Image2… |
| aspect_ratio | string (enum) (16:9, 9:16, 1:1, 4:3, 3:4) | no | Output frame shape. |
| resolution | string (enum) (720p, 1080p) | no | Output resolution. Higher resolutions cost more per second. |
| duration | integer (3–15) | no | Length of the generated clip in seconds (3–15s). You pay per second. |
| seed | integer | no | Use the same seed and settings to reproduce a result. Leave empty for random. |

```bash
curl -X POST https://cheapergen.com/api/v1/run/shengshu/vidu-q3-mix/reference-to-video \
  -H "Authorization: Bearer $CHEAPERGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "prompt": "@Image1 walks through the market from @Image2 holding the bag from @Image3, handheld tracking shot",
  "reference_image_urls": [
    "https://cdn.cheapergen.com/samples/reference-1.jpg",
    "https://cdn.cheapergen.com/samples/reference-2.jpg",
    "https://cdn.cheapergen.com/samples/reference-3.jpg"
  ],
  "aspect_ratio": "16:9",
  "resolution": "720p",
  "duration": 5
}'
```

## Getting the result
Jobs are async. Poll `GET https://cheapergen.com/api/v1/generations/{id}` until status is succeeded/failed/canceled, or pass `webhook_url`. Failed generations are refunded automatically.

## FAQ
**How is Vidu Q3 Mix priced?**
Vidu Q3 Mix is billed per second of output video at the selected resolution. Audio is included at no extra cost, and failed generations are never charged.

**Is this the official Vidu Q3 Mix?**
Yes. Requests run on Shengshu's Vidu Q3 Mix through official API channels, at a lower price than Vidu's own list price.

**How do I reference images?**
Attach 1–7 images and mention them in the prompt as @Image1, @Image2… Describe the action and camera; appearance comes from the images.

**Can I use the output commercially?**
Yes, subject to Vidu's terms of use and our Terms of Service.

Vidu Q3 Mix is developed by Shengshu. Cheaper Gen. provides API access and does not own the model.