SigmaZ AI Lab

SigmaZ AI Lab is a Beijing-based startup building real-time interactive video generation through diffusion language models (DLM), co-founded in 2023 by CEO William Yang (born 2003, a Cambridge serial entrepreneur) and CTO Derek Law (formerly Amazon AGI Lab London's lead for vision-code training) . The company trains models to output hybrid pixel-and-code "living scenes" that users can modify on the fly, distinguishing it from fixed-pixel traditional video . Its technical stack centers on three loops: test-time scaling, training-time internalization of refinement trajectories, and evaluator evolution via a ~1,000-person expert network drawn from QS top-200 universities . In July 2026 internal benchmarks across 173 videos, SigmaZ's engine reportedly outperformed Fable 5, Seedance, and Veo on quality, fact coverage, and text accuracy in information-dense scenarios . Its first product, Tap8, is slated for 2026 release as a "practical and fun real-time interactive content platform" . The company has raised multiple funding rounds, including a recent multimillion-dollar round led by BlueRun Ventures and participation from Yunqi Capital's Y Transformers program .