CaliBench tests whether video world models reproduce the true randomness of reality

damianplayer · x · 2026-08-19

Odyssey introduces CaliBench, a benchmark evaluating whether video world models reproduce the true randomness of our universe. Oliver Cameron draws an analogy to the black cat appearing twice in The Matrix: generated simulations can look visually realistic while the underlying distribution is wrong. The approach: have the model roll dice or pick cards and check whether outcome distributions match reality — a direct measurement of whether randomness is properly modeled.

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