World Model
Definition
An AI's internal sense of how things work, used to predict what happens next. A system with a good world model doesn't just react; it carries something like an understanding of cause and effect, of objects, space, and consequence. Whether today's AI truly has this, or only imitates it convincingly, is one of the live debates in the field. It matters most for AI that has to act in the real world, like robots and self-driving cars.
Why It Matters
It's central to the question of whether AI understands anything or merely predicts. You'll meet the term in debates about how far this technology can really go.
What does that look like in practice?
A self-driving car needs a world model: a working sense that a ball rolling into the road may be followed by a child.
What people actually mean when they say this
When someone asks whether AI 'really understands,' they're often asking whether it has a world model or is just predicting likely words.
Last reviewed: June 2026
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