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AI IntelligenceAug 23, 2026AI Intelligence
Article

World models that ignore human beliefs predict the wrong actions, new research shows

New research introduces Mental World Modeling, adding beliefs, desires, and intentions to world models such as Sora and Genie, which only simulate physics. Weaker language models using this framework outperform stronger models without it. The main bottleneck is predicting how physical and mental states change together.

Frontier EditorialSource: The Decoder
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World models that ignore human beliefs predict the wrong actions, new research shows: New research introduces Mental World Modeling, adding beliefs, desires, and intentions to world models such as Sora and Genie, which only simulate physics. Weaker language models using this framework outperform stronger models without it. The main bottleneck is predicting how physical and mental states change together.