Vidu S1

Based on the available evidence, Vidu S1 looks more like a notable frontier model in real-time interactive video than a broadly validated, production-proven replacement for mature digital human products. Proof of attention mainly comes from X reposts and multiple Zhihu writeups, which shows strong interest around the “real-time video interaction” angle. Proof of usability is weaker: most support comes from report summaries, technical explainers, and a small number of hands-on impressions, so public evidence for large-scale deployment, long-session stability, and complex scene reliability is still limited.

In practice, it is not a standard text-to-video model, and not just a pre-rigged avatar or lip-sync live2D tool. A better comparison is a generative video character engine for ongoing conversation. Several sources describe a streaming setup with bidirectional perception, where voice and camera input drive frame-by-frame generation. That makes it more relevant for digital companions, interactive NPCs, exhibition demos, and experimental character calls than for one-off cinematic clip generation.