xAI Grok Imagine adds 15-second video generation but there’s a catch

xAI is offering 10-second video generation for Grok Imagine users, but for some users, this limit was increased to 15 seconds. Last week, xAI introduced Grok Imagine API, which supports 15-second video generation, a feature that lets developers create longer AI-generated clips than what’s currently available in the standard Grok app.

The revelation came from xAI team member Ethan He, who shared a screenshot of the new API interface. The controls now include options for resolution (720p or 480p), a wide range of aspect ratios from 20:9 to 1:1, and video duration up to 15 seconds.

These settings give developers much more flexibility when building applications that use Grok’s video generation capabilities. The standout feature is the 15-second duration. In the regular Grok experience, available through the web or mobile apps, video clips are capped at 10 seconds.

This extra five seconds might seem small, but it opens up new creative possibilities, such as longer storytelling, smoother animations, or more detailed demonstrations. To remind, there’s a catch: the xAI Grok Imagine 15-second video option is exclusive to the API.

The API version also stands out for its customizable parameters. Developers can fine-tune resolution and aspect ratio to match specific project needs, whether that’s widescreen, square social media formats, or anything in between. This level of control makes the API particularly appealing for building third-party tools, integrations, or custom experiences.

Grok Imagine is xAI’s multimodal model designed for generating images and short videos from text prompts. The newly enhanced API brings professional-grade options to developers, bridging the gap between casual use and more advanced applications.

Imagine users have expressed excitement about potential integrations and longer-form content, though some noted ongoing challenges like maintaining character consistency across multiple clips.

In summary, the move to support longer, customizable videos through the Grok Imagine API shows xAI’s commitment to empowering developers while gradually expanding capabilities. For everyday users, the 10-second limit remains in place for now, but this API update hints at what may eventually come to the broader Grok platform. As AI video tools continue to evolve, features like these keep xAI competitive in a fast-moving field.