Generate image to video with Grok Imagine Video 1.5 (xAI): native audio, up to 15 seconds, via one simple API endpoint. Generate videos with Grok Imagine Video 1.5 (xAI) by animating an image, with native audio, up to 15 seconds.
Generate videos with Grok Imagine Video 1.5 (xAI) by animating an image, with native audio, up to 15 seconds.
About this model
Grok Imagine Video 1.5 Image-to-Video is xAI's flagship video model on a dedicated Muapi endpoint. Generate clips of 1 to 15 seconds with a native audio track in 480p, 720p or 1080p, across nine aspect ratios from 16:9 and 9:16 to 21:9 and 5:2. It is suited to cinematic shots, product videos and social content where motion quality and audio matter.
Cost analysis
| Provider | Cost | Notes |
|---|---|---|
| muapiapp | $0.08/sec at 480p, $0.14/sec at 720p, $0.25/sec at 1080p (8s at 480p = $0.64) | Pay-as-you-go with no subscription required. |
Pay-as-you-go with no subscription required.
** Competitor pricing is estimated based on similar model architectures and usage tiers.
Configuration schema
| Parameter | Type | Description | Default |
|---|---|---|---|
| Prompt | string | Text description of the video. Optional; describes the motion. | A dog running on a sunny beach, cinematic slow motion. |
| Image URL | string | Image to animate. The video follows this image's aspect ratio. | undefined |
| Last Frame Image URL | string | Optional last-frame image. When provided the video interpolates from the first to the last frame; resolution is limited to 480p/720p. | undefined |
| Aspect Ratio | Enum (9 options) | Ignored — the video uses the input image's aspect ratio. | 16:9 |
| Resolution | Enum (3 options) | Output resolution. 1080p is generated by upscaling 720p. | 480p |
| Duration (seconds) | int | Video duration in seconds. | 8 |
| Generate Audio | boolean | Generate a native audio track. Turn off for a silent video. | true |
Text description of the video. Optional; describes the motion.
A dog running on a sunny beach, cinematic slow motion.Image to animate. The video follows this image's aspect ratio.
undefinedOptional last-frame image. When provided the video interpolates from the first to the last frame; resolution is limited to 480p/720p.
undefinedIgnored — the video uses the input image's aspect ratio.
16:9Output resolution. 1080p is generated by upscaling 720p.
480pVideo duration in seconds.
8Generate a native audio track. Turn off for a silent video.
trueDeveloper documentation
Input: Provide the first frame in image_url and, optionally, a last frame in last_image (then 480p/720p only). A prompt is optional and describes the motion.
Set duration, resolution and audio: 1-15 seconds (default 8), resolution 480p, 720p or 1080p (1080p is upscaled from 720p), and generate_audio on or off.
Submit and poll: The API returns a request_id; poll GET /api/v1/predictions/{request_id}/result until status is completed.
curl -X POST "https://api.muapi.ai/api/v1/grok-imagine-video-1-5-image-to-video" \
-H "x-api-key: $MUAPI_KEY" \
-H "Content-Type: application/json" \
-d '{"prompt":"The camera slowly pushes in as the subject smiles.","image_url":"https://example.com/photo.jpg","duration":8,"resolution":"720p","generate_audio":true}'
Frequently asked
Yes. generate_audio defaults to true and produces a native audio track. Set it to false for a silent video.
From 1 to 15 seconds, with a default of 8 seconds.
480p, 720p and 1080p. 1080p is generated by upscaling 720p.
16:9, 9:16, 1:1, 4:3, 3:4, 3:2, 2:3, 21:9 and 5:2. For image-to-video the input image's own aspect ratio is used.
$0.08/sec at 480p, $0.14/sec at 720p, $0.25/sec at 1080p (8s at 480p = $0.64)