xAI has expanded Imagine Video 1.5 with image and voice references, prompt-only video generation, and native 1080p output. Image and voice references are starting in the United States for SuperGrok Heavy and SuperGrok Plus subscribers on Grok’s Imagine website and iOS app, with a rollout to all tiers over the next few days. Text-to-video and native 1080p generation are already generally available through Grok Imagine on the web, iOS, and Android, with 1080p supported for both text-to-video and image-to-video workflows. Multi-Reference lets creators assign separate visual anchors to a generation, and the model accepts up to seven references in a single generation. Voice consistency allows the model to maintain the same face and voice across scenes when a character image and voice reference are supplied together. Developers can access image references, text-to-video, and native 1080p through the xAI API using the grok-imagine-video-1.5 model, while voice references require a request to xAI. The rollout extends the Imagine Video 1.5 release introduced last month, which xAI presented as an advance in motion, physics, and audio.