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

# Grok Imagine Video 1.5 Lite

> Generate low-cost videos with xAI Grok Imagine Video 1.5 Lite — text-to-video and image-to-video. See parameters, pricing, and API examples.

Generate videos at the lowest Grok price point with xAI's Grok Imagine Video 1.5 Lite. Supports text-to-video and image-to-video from a single start frame.

<Note>
  Lite does not accept `image_urls`, `end_image_url`, `keyframes`, or `voice_ids`. For reference images, end frames, keyframes, and preset voices, use [Grok Imagine Video 1.5](/models/video/xai/grok-imagine-1.5-video).
</Note>

## Model

```
xai/grok-imagine-1.5-lite-video
```

## Pricing

Billed per second of output video.

| Resolution | Per second |
| - | - |
| 480p | \$0.01 |
| 720p | \$0.015 |
| 1080p | \$0.07 |

## Parameters

| Parameter | Type | Required | Default | Allowed Values | Description |
| - | - | - | - | - | - |
| `prompt` | string | Conditional | `""` | — | Text prompt guiding the video. Required unless `start_image_url` is supplied |
| `aspect_ratio` | string | No | `"auto"` | `"auto"`, `"1:1"`, `"16:9"`, `"9:16"`, `"4:3"`, `"3:4"`, `"3:2"`, `"2:3"`, `"21:9"`, `"5:2"` | Output aspect ratio. `"auto"` lets the model choose. Ignored for image-to-video (the start frame governs) |
| `duration` | int | No | `6` | `1`–`15` | Video length in seconds |
| `resolution` | string | No | `"480p"` | `"480p"`, `"720p"`, `"1080p"` | Output resolution |
| `start_image_url` | string | No | `null` | public `https://` URL | Start frame to animate |
| `audio` | boolean | No | `true` | `true`, `false` | Generate the soundtrack. `false` renders a silent clip |

<Note>
  Unknown request fields are rejected rather than ignored.
</Note>

## Example Requests

### Text to video

```bash theme={null}
curl -X POST https://api.unifically.com/v1/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "xai/grok-imagine-1.5-lite-video",
    "input": {
      "prompt": "A paper boat drifting down a rain-soaked street",
      "aspect_ratio": "9:16",
      "duration": 6,
      "resolution": "480p"
    }
  }'
```

### Image to video

```bash theme={null}
curl -X POST https://api.unifically.com/v1/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "xai/grok-imagine-1.5-lite-video",
    "input": {
      "start_image_url": "https://example.com/start-frame.jpg",
      "prompt": "Slow push-in as the candle flickers",
      "duration": 6,
      "resolution": "720p",
      "audio": false
    }
  }'
```

## Response

```json theme={null}
{
  "code": 200,
  "success": true,
  "data": {
    "task_id": "abc123def456",
    "status": "processing"
  }
}
```

<Note>
  **Volume discounts** are available for almost all models. Reach out at [contact@unifically.com](mailto:contact@unifically.com) to discuss custom pricing.
</Note>


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