Fei-Fei Li on LLM limits: 'Language is purely generated signal' vs. the physical 3D world

rohanpaul_ai · x · 2026-09-29

Fei-Fei Li on the limitations of LLMs: "Language is purely generated signal. You don't go out in nature and there's words written in the sky for you. There is a 3D world that follows laws of physics."

The remark is consistent with her long-running spatial intelligence thesis — models trained only on language signals struggle to capture the physical structure of the real world, underscoring the rationale behind her bet on world models and spatial AI.

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