Machine Heart

Jul 22, 2026 · Artificial Intelligence

Open VideoChat3: A Full‑Stack 4B Video Understanding Model for Short, Long, and Streaming Videos

VideoChat3 is a 4‑billion‑parameter multimodal model that introduces an Inflated 3D Vision Transformer and an adaptive frame‑resolution mechanism to efficiently handle short clips, hour‑long videos, and live streams, achieving competitive benchmarks while being fully open‑source.