> ## 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.

# Grok Video 1.5

> xAI Grok · `grok-imagine-video-1.5` · video

## Identifier

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

## Capabilities

| Property            | Value                                                                                         |
| ------------------- | --------------------------------------------------------------------------------------------- |
| Reference inputs    | 1                                                                                             |
| Aspect ratios       | `16:9`, `4:3`, `3:2`, `1:1`, `2:3`, `3:4`, `9:16` (default `9:16`)                            |
| Resolutions         | `480p`, `720p`, `1080p` (default `720p`)                                                      |
| Durations (seconds) | `1`, `2`, `3`, `4`, `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15` (default `6`) |
| Audio               | yes                                                                                           |
| Max prompt length   | 4096 chars                                                                                    |
| Tags                | `new`                                                                                         |

## Inputs

Pass reference media in the `references` array (1 item). At least 1 reference is required. 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 (6s at `720p`): **\~8.399999999999999 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": "grok-imagine-video-1.5",
  "prompt": "Describe what you want to generate",
  "references": [
    {
      "url": "https://example.com/reference.jpg"
    }
  ],
  "aspect_ratio": "9:16",
  "resolution": "720p",
  "duration": 6
}
```

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