Grok Imagine Video 1.5 - Unifically

Animate a starting image into video using xAI’s Grok Imagine 1.5 model. This is the official API version of Grok Imagine 1.5 Video and is image-to-video only — a start image is required.

Text-to-video is not supported on this model at any aspect ratio. Omitting start_image_url fails with Text-to-video is not supported for this model. For text-to-video, use Grok Imagine Video (the speed-optimized 1.5 build).

Grok Imagine Video Extend and Grok Imagine Upscale do not work with this model. They only accept task IDs from xai/grok-imagine-video (the speed-optimized 1.5 build).

Model

xai/grok-imagine-1.5-video

Parameters

Parameter	Type	Required	Default	Allowed Values	Description
`start_image_url`	string	Yes	—	public `https://` URL	Start frame image to animate
`prompt`	string	No	`""`	—	Text prompt guiding the motion
`duration`	int	No	—	`1`–`15`	Video length in seconds
`resolution`	string	No	—	`"480p"`, `"720p"`, `"1080p"`	Output resolution

Example Request

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-video",
    "input": {
      "start_image_url": "https://example.com/start-frame.jpg",
      "prompt": "Camera slowly zooms in while clouds drift across the sky",
      "duration": 10,
      "resolution": "1080p"
    }
  }'

Response

{
  "code": 200,
  "success": true,
  "data": {
    "task_id": "abc123def456",
    "status": "processing"
  }
}

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