# Grok Imagine Video V1.5 Lite Text-to-Video — Atlas Cloud API

> xAI's lowest-cost Grok Imagine video model turns a text prompt into a 1-15 second clip with native audio and lip-synced speech, at 480p, 720p, or 1080p (upscaled from 720p).

This is the machine-readable API reference for **Grok Imagine Video V1.5 Lite Text-to-Video** on Atlas Cloud,
a unified API platform for 400+ AI models across text, image, video, audio and 3D.

- **Model ID**: `xai/grok-imagine-video-v1.5-lite/text-to-video`
- **Built by**: xAI
- **Modality**: Video
- **Model page**: https://www.atlascloud.ai/models/xai/grok-imagine-video-v1.5-lite/text-to-video
- **API key**: https://www.atlascloud.ai/console/api-keys
- **Docs**: https://www.atlascloud.ai/docs

## Pricing on Atlas Cloud

- $0.02 per second of generated video
- Pay-as-you-go. No minimum spend, no subscription required.

> **These are the authoritative Atlas Cloud rates for this model.** Any price that
> appears in the vendor description further down refers to a different platform or
> a different model variant and does not apply here.

## Use this model from an AI agent

Atlas Cloud ships three first-party integration surfaces. All three authenticate
with the same API key via the `ATLASCLOUD_API_KEY` environment variable.

### MCP server

The official MCP server (`atlascloud-mcp`) exposes this model to any
MCP-compatible host — Claude Code, OpenAI Codex, Cursor, Gemini CLI, Goose,
Claude Desktop. One-line install:

```bash
# Claude Code
claude mcp add atlascloud -- npx -y atlascloud-mcp

# OpenAI Codex CLI
codex mcp add atlascloud -- npx -y atlascloud-mcp

# Gemini CLI
gemini mcp add atlascloud -- npx -y atlascloud-mcp

export ATLASCLOUD_API_KEY="your-api-key"
```

Then ask in plain English; the agent calls `atlas_generate_video` with `model: "xai/grok-imagine-video-v1.5-lite/text-to-video"`.
The server fetches each model's schema and validates parameters before submitting,
so invalid requests fail fast without spending credits.

MCP docs: https://www.atlascloud.ai/docs/mcp-server

### Agent Skills

`atlas-cloud-skills` is a portable skill package (API reference, code templates in
Python / Node.js / cURL, model IDs with pricing) for Claude Code, Cursor, Codex and
12+ other agents:

```bash
npx skills add AtlasCloudAI/atlas-cloud-skills
export ATLASCLOUD_API_KEY="your-api-key"
```

Skills docs: https://www.atlascloud.ai/docs/skills

### CLI

The `atlas` binary runs Atlas Cloud from a terminal or CI script. Async media jobs
are polled and downloaded automatically (use `--no-download` when a script only
needs the output URLs):

```bash
# Install (Homebrew, npm, or shell installer)
brew install AtlasCloudAI/tap/atlascloud
# npm install -g atlascloud-cli
# curl -fsSL https://raw.githubusercontent.com/AtlasCloudAI/cli/main/install.sh | sh

atlas auth login
atlas generate video xai/grok-imagine-video-v1.5-lite/text-to-video -p "Your prompt here"
```

CLI docs: https://www.atlascloud.ai/docs/cli

## HTTP API reference

- **Submit endpoint (POST)**: `https://api.atlascloud.ai/api/v1/model/generateVideo` — start an async generation; returns a `prediction_id`
- **Poll endpoint (GET)**: `https://api.atlascloud.ai/api/v1/model/prediction/{prediction_id}` — poll this until the prediction finishes
- **Model ID**: `xai/grok-imagine-video-v1.5-lite/text-to-video`


## API Information

This model can be used via our HTTP API or more conveniently via our client libraries.
See the input and output schema below, as well as the usage examples.


### Input Schema

The API accepts the following input parameters:

- **`model`** (`string`, _required_):
  Model name.
  - Default: `"xai/grok-imagine-video-v1.5-lite/text-to-video"`
  - Options: "xai/grok-imagine-video-v1.5-lite/text-to-video"

- **`prompt`** (`string`, _required_):
  Text description of the scene, motion, camera movement and sound.
  - Default: `"A paper boat drifts down a rain-soaked street at dusk, neon reflections rippling on the water, soft rain ambience."`

- **`duration`** (`integer`, _optional_):
  Length of the generated video in seconds, 1 to 15.
  - Default: `8`
  - Min: 1
  - Max: 15

- **`resolution`** (`string`, _optional_):
  Output resolution. 1080p is upscaled from 720p. Billed per second at the selected tier.
  - Default: `"720p"`
  - Options: "480p", "720p", "1080p"

- **`aspect_ratio`** (`string`, _optional_):
  Aspect ratio of the output video.
  - Default: `"16:9"`
  - Options: "16:9", "9:16", "1:1", "4:3", "3:4", "3:2", "2:3", "21:9", "5:2"

- **`generate_audio`** (`boolean`, _optional_):
  Generate synchronized audio (speech with lip-sync, sound effects, ambience) together with the video. Set false for a silent clip.
  - Default: `true`



**Required Parameters Example**:

```json
{
  "model": "xai/grok-imagine-video-v1.5-lite/text-to-video",
  "prompt": "A paper boat drifts down a rain-soaked street at dusk, neon reflections rippling on the water, soft rain ambience."
}
```


**Full Example**:

```json
{
  "model": "xai/grok-imagine-video-v1.5-lite/text-to-video",
  "prompt": "A paper boat drifts down a rain-soaked street at dusk, neon reflections rippling on the water, soft rain ambience.",
  "duration": 8,
  "resolution": "720p",
  "aspect_ratio": "16:9",
  "generate_audio": true
}
```


### Output Schema

The API returns the following output format:


- **`id`** (`string`, _optional_):
  Unique identifier for the prediction, the ID of the prediction to get.

- **`urls`** (`object`, _optional_):
  Object containing related API endpoints.

- **`model`** (`string`, _optional_):
  Model ID used for the prediction.

- **`status`** (`string`, _optional_):
  Status of the task: created, processing, completed, or failed.

- **`outputs`** (`array[string]`, _optional_):
  Array of URLs to the generated content (empty when status is not completed).

- **`created_at`** (`string`, _optional_):
  ISO timestamp of when the request was created.



**Example Response**:

```json
{
  "id": "",
  "urls": {},
  "model": "",
  "status": "",
  "outputs": [
    ""
  ],
  "created_at": ""
}
```


## Usage Examples

### cURL

```bash
# Step 1: Start generation (async)
curl -X POST "https://api.atlascloud.ai/api/v1/model/generateVideo" \
  -H "Authorization: Bearer $ATLASCLOUD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "xai/grok-imagine-video-v1.5-lite/text-to-video",
  "prompt": "A paper boat drifts down a rain-soaked street at dusk, neon reflections rippling on the water, soft rain ambience.",
  "duration": 8,
  "resolution": "720p",
  "aspect_ratio": "16:9",
  "generate_audio": true
}'

# Response will contain: {"code": 200, "data": {"id": "prediction_id", "status": "processing"}}

# Step 2: Poll for result (replace {prediction_id} with the id returned above)
curl -X GET "https://api.atlascloud.ai/api/v1/model/prediction/{prediction_id}" \
  -H "Authorization: Bearer $ATLASCLOUD_API_KEY"

# Keep polling until status is "completed", "succeeded" or "failed"
# When completed, outputs will contain the generated content URL(s)
```

## Additional Resources

### Documentation

- [Model Playground](https://www.atlascloud.ai/models/xai/grok-imagine-video-v1.5-lite/text-to-video)

## About this model

_Vendor-supplied description. Any pricing or endpoint mentioned below refers to_
_other platforms — use the Atlas Cloud values above._

### Grok Imagine Video V1.5 Lite Text-to-Video

**Grok Imagine Video V1.5 Lite Text-to-Video** is the lowest-cost model in xAI's Grok Imagine video family. Describe a scene in text and it generates a 1–15 second clip with natively generated audio, including lip-synced speech, sound effects, and ambience.

#### Why Choose This?

- **Lowest price per second in the Grok Imagine family.** 480p costs $0.02 per second and 720p costs $0.03 per second. That makes it a good fit for drafts, A/B tests, and high-volume social content.
- **Native audio.** Speech with lip-sync, sound effects, and ambience are generated together with the video. Set `generate_audio` to `false` for a silent clip.
- **Flexible length.** Any duration from 1 to 15 seconds, in 1-second steps.
- **Wide format support.** Nine aspect ratios, from 9:16 vertical to 21:9 and 5:2 cinematic widescreen.
- **Up to 1080p.** 480p and 720p are rendered directly. 1080p is upscaled from 720p.

#### Parameters

| Parameter | Required | Description |
| --- | --- | --- |
| model | Yes | `xai/grok-imagine-video-v1.5-lite/text-to-video` |
| prompt | Yes | Description of the scene, motion, camera movement, and sound. |
| duration | No | Video length in seconds, integer 1–15. Default `8`. |
| resolution | No | `480p`, `720p` (default), `1080p` (upscaled from 720p). |
| aspect_ratio | No | `16:9` (default), `9:16`, `1:1`, `4:3`, `3:4`, `3:2`, `2:3`, `21:9`, `5:2`. |
| generate_audio | No | Generate synchronized audio. Default `true`. |

#### How to Use

_(Description truncated. Full text on the model page.)_

---

Atlas Cloud — one API for 400+ AI models. Model page: https://www.atlascloud.ai/models/xai/grok-imagine-video-v1.5-lite/text-to-video · Docs: https://www.atlascloud.ai/docs