# Grok Imagine Video 1.5 Lite API (xAI)

> Grok Imagine Video 1.5 Lite is xAI's faster, lower-cost version of Grok Imagine Video 1.5: 1–15 second videos with native audio at 480p, 720p or 1080p, from text or a first frame.

Page: https://cheapergen.com/models/xai/grok-imagine-video-1.5-lite · API reference: https://cheapergen.com/models/xai/grok-imagine-video-1.5-lite/api · Live status and uptime: https://cheapergen.com/models/xai/grok-imagine-video-1.5-lite/status

Our prices updated 2026-11-15: CheaperGen prices are live, and this file is regenerated every 5 minutes. Third-party prices keep the dates they were checked.

## Pricing
Official list price source: xAI API list price for grok-imagine-video-1.5-lite ($0.02 / s at 480p, $0.03 at 720p, $0.14 at 1080p; $0.01 per input image). Prices verified October 18, 2026.

| Tier | Official | CheaperGen | Save |
|---|---|---|---|
| 480p | $0.0200/s | $0.0146/s | 27% |
| 720p | $0.0300/s | $0.0219/s | 27% |
| 1080p | $0.1400/s | $0.1021/s | 27% |

Monthly plans (Pro, Max) lower the price on most models while they're active: https://cheapergen.com/pricing#plans. Volume pricing for larger teams: https://cheapergen.com/enterprise#contact.

## Specs
- Resolutions: 480p · 720p · 1080p (upscaled from 720p)
- Duration: 1–15 s
- Aspect ratios: 16:9 · 9:16 · 1:1 · 4:3 · 3:4 · 3:2 · 2:3
- Audio: Yes (included)
- Model id (xAI): grok-imagine-video-1.5-lite

## Endpoints

### Text to Video — `POST https://cheapergen.com/api/v1/run/xai/grok-imagine-video-1.5-lite/text-to-video`

| Param | Type | Required | Description |
|---|---|---|---|
| prompt | string | yes | Describe the shot: subject, action, camera movement, lighting and style. |
| aspect_ratio | string (enum) (16:9, 9:16, 1:1, 4:3, 3:4, 3:2, 2:3) | no | Output frame shape. |
| resolution | string (enum) (480p, 720p, 1080p) | no | Output resolution. Higher resolutions cost more per second. |
| duration | integer (1–15) | no | Length of the generated clip in seconds (1–15s). You pay per second. |

```bash
curl -X POST https://cheapergen.com/api/v1/run/xai/grok-imagine-video-1.5-lite/text-to-video \
  -H "Authorization: Bearer $CHEAPERGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "prompt": "A paper boat drifts down a rain-soaked street at dusk, neon reflections rippling on the water, soft rain ambience",
  "aspect_ratio": "16:9",
  "resolution": "720p",
  "duration": 8
}'
```

### Image to Video — `POST https://cheapergen.com/api/v1/run/xai/grok-imagine-video-1.5-lite/image-to-video`

| Param | Type | Required | Description |
|---|---|---|---|
| prompt | string | yes | Describe the shot: subject, action, camera movement, lighting and style. |
| image_url | string (URL) | yes | Image used as the opening frame; the clip keeps its shape. JPG/PNG/WebP, URL or upload. |
| resolution | string (enum) (480p, 720p, 1080p) | no | Output resolution. Higher resolutions cost more per second. |
| duration | integer (1–15) | no | Length of the generated clip in seconds (1–15s). You pay per second. |

```bash
curl -X POST https://cheapergen.com/api/v1/run/xai/grok-imagine-video-1.5-lite/image-to-video \
  -H "Authorization: Bearer $CHEAPERGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "prompt": "She turns toward the camera and smiles as the wind moves through her hair, soft café chatter",
  "image_url": "https://cdn.cheapergen.com/samples/portrait.jpg",
  "resolution": "720p",
  "duration": 8
}'
```

## 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.
When status is `succeeded`, the video is at `output.video.url` (with `output.video.content_type`).
Output URLs expire with the account's retention (1 day after the job finishes by default): download or re-host them.

## FAQ
**How is Grok Imagine Video 1.5 Lite priced?**
Per second of output at the chosen resolution, with audio included; image to video adds a cent for the first frame before our discount. Failed generations are never charged.

**How does Lite differ from Grok Imagine Video 1.5?**
Lite is a faster, lower-cost model distilled from 1.5. It trades some quality for speed and price, renders 1080p by upscaling from 720p, and takes a first frame rather than reference images. Choose 1.5 for the best quality or for reference images.

**Is this xAI's Grok Imagine Video 1.5 Lite?**
Yes, it's xAI's Grok Imagine Video 1.5 Lite model, at a lower price than xAI's list price.

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

Grok Imagine Video 1.5 Lite is developed by xAI. CheaperGen provides API access and does not own the model.