> ## 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.

# Sora 2

> OpenAI Sora · `sora-2` · video

## Identifier

Use the model identifier `sora-2` in the `model` field when calling [`/asset/start`](/api-reference/assets/start).

## Capabilities

| Property            | Value                           |
| ------------------- | ------------------------------- |
| Reference inputs    | 0–1                             |
| Aspect ratios       | `16:9`, `9:16` (default `9:16`) |
| Resolutions         | `720p` (default `720p`)         |
| Durations (seconds) | `4`, `8`, `12` (default `4`)    |
| Audio               | yes                             |
| Max prompt length   | 2000 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

## Pricing

Default parameters (4s at `720p`): **\~4.8 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": "sora-2",
  "prompt": "Describe what you want to generate",
  "aspect_ratio": "9:16",
  "resolution": "720p",
  "duration": 4
}
```

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