Elon Musk’s artificial-intelligence company xAI has broadened the reach of its new image- and video-generation tool, Grok Imagine, rolling the feature out to both iOS and Android versions of the Grok app and enabling one-tap conversion of text prompts or existing photos into six-second videos with sound. The service converts a selected image to video in roughly 15 seconds and now supports speech-based prompting, video sharing, muting and improved audio quality after a series of updates issued between 5 and 8 August. To accelerate adoption, xAI made Grok Imagine’s video generation free for all U.S. users beginning 7 August for a limited period. The promotion triggered a surge in downloads that lifted Grok to No. 2 in the U.S. App Store’s Productivity chart and No. 7 overall, up from No. 56 a week earlier, according to Musk. Separate updates (iOS versions 1.1.39 to 1.1.41 and Android version 1.0.25) added easier social-media sharing, bug fixes and higher-fidelity sound. Spanish tech outlet Infobae also reported that Grok Imagine includes an optional NSFW mode allowing adult content generation, a policy that differentiates xAI from rivals such as OpenAI’s DALL·E and Google’s Imagen, which bar explicit imagery. Against this backdrop, Musk said on 7 August that xAI will release Grok 5 “before the end of this year” and described the forthcoming model as “crushingly good.” The pledge came hours after OpenAI unveiled its GPT-5 model, underscoring the rapid product cadence and escalating rivalry among leading generative-AI developers.