xAI launches Grok Imagine Video 1.5: faster image-to-video with synced audio

xAI 发布 Grok Imagine Video 1.5

xAI upgraded its image-to-video model to 1.5, now generally available via API with a Fast variant on Grok and mobile apps. A 6-second 720p clip takes about 25 seconds, nearly twice as fast as the previous 40+ seconds. Audio is generated in the same pass—ambience, effects, and dialogue land on the action with better lip sync. Motion holds up over longer clips with fewer warps and more believable weight. Three workflow features are rolling out: Projects for organization, parallel multi-agent prompting, and library search. The post doesn't disclose training data scale or pricing.

Why it matters: xAI shipped a meaningful image-to-video upgrade with 2x speed, synced audio, and better physics. Score stays at 78 because the video generation space already has established leaders — this is a solid iteration, not a market shift.