> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hoox.video/llms.txt
> Use this file to discover all available pages before exploring further.

# Seedance 1.5

> ByteDance · `seedance-1.5` · video

## Identifier

Use the model identifier `seedance-1.5` in the `model` field when calling [`/asset/start`](/api-reference/assets/start).

## Capabilities

| Property            | Value                                                        |
| ------------------- | ------------------------------------------------------------ |
| Reference inputs    | 0–1                                                          |
| Aspect ratios       | `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16` (default `16:9`) |
| Resolutions         | `480p`, `720p`, `1080p` (default `720p`)                     |
| Durations (seconds) | `4`, `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12` (default `5`) |
| Audio               | no                                                           |
| Max prompt length   | 3000 chars                                                   |

## Inputs

Pass reference media in the `references` array (0–1 item). Optional. Each item accepts exactly one of:

* `url` — a direct, publicly accessible file URL
* `asset_id` — the ID of an existing asset in your Hoox space (e.g. a previous generation)
* `avatar_id` — the ID of an avatar defined in your Hoox space

## Custom settings

These keys go inside the `model_settings` object of the request body.

| Key             | Type    | Default | Affects cost |
| --------------- | ------- | ------- | ------------ |
| `generateAudio` | boolean | `false` | yes          |
| `camera_fixed`  | boolean | `false` | no           |

## Pricing

Default parameters (5s at `720p`): **\~2.6 credits / generation**.

For exact pricing with your own parameters, call [`/asset/pricing`](/api-reference/assets/pricing) with the `model` and any parameters that affect cost.

## Example request

```json theme={null}
{
  "type": "video",
  "model": "seedance-1.5",
  "prompt": "Describe what you want to generate",
  "aspect_ratio": "16:9",
  "resolution": "720p",
  "duration": 5
}
```

See [`/asset/start`](/api-reference/assets/start) for the full request/response reference, error codes, and code samples in cURL / Python / JavaScript.