At the 2026 Global Digital Economy Conference, ShengShu Technology unveiled Vidu S1, a next-generation video foundation model that delivers real-time interactive video generation. Vidu S1 supports real-time video conversations with voice-guided character control, allowing users to control AI avatars naturally through voice input while engaging in unlimited, continuous interactions. The model delivers 540P (960×540) resolution at 25 FPS (up to 42 FPS) and enables users to instantly create personalized interactive characters from a single image—whether a real person, an anime character, or even a pet—paired with a customizable voice. The entire system runs on consumer-grade GPUs. Vidu S1 introduces a real-time interactive video generation framework that processes voice input alongside conversational context and current visual context, allowing subsequent video content to be generated and updated in real time. The model interprets the semantic meaning, intent, and emotional context of spoken input to generate synchronized lip movements, facial expressions, eye movements, gestures, body posture, and full-body actions in real time. Vidu S1 adopts an autoregressive diffusion (AR + Diffusion) architecture, continuously predicting and generating subsequent video content based on previously generated frames, current voice instructions, and conversational context.