Physics you can walk around in. Every experiment here was built by Claude Opus 5.5, with me as the director.
These are not rendered videos. Each one is a complete three-dimensional world that runs live in your browser: you orbit it, zoom into any part, open it up and change the physics while it runs. I asked for cinematic quality and pushed the model as far as it goes, because an interactive world you can explore is what a video can never give you.