xAI has quietly introduced the Grok 4.3 beta version on its official website, Grok.com, as an 'Early Access' option. This update, detected by users on April 17, marks a shift from the previously available Grok 4.20 series, which was released in February. Grok 4.3 is anticipated to offer significant improvements, particularly in long-context processing and native multimodal video understanding capabilities.