world model means A representation an AI builds of how the world works — its physics, objects, causality — that lets it predict and plan. It's mostly used in casual online conversation. It's casual and generally safe with friends and online. It's standard online vocabulary; nothing inherently concerning about hearing it.
world model
A representation an AI builds of how the world works — its physics, objects, causality — that lets it predict and plan.
wɜːld ˈmɒd.əlDocumented since 2010s2010sGen Alphatrending564 viewsLast reviewed Jun 29, 2026＋ Add a definition
Etymology timeline
Born ~2018 · no dated citations yetSeen in the wild
Wikipedia: Three-world model
The three-world model is a lens of political analysis describing the world during the Cold War.
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Firecrawl: World model (artificial intelligence) - Wikipedia
AMI raised $1.03 billion.[\[9\]](https://en.wikipedia.org/wiki/World_model_(artificial_intelligence)#cite_note-9) In April 2026, [Alibaba](https://en.wikipedia.org/wiki/Alibaba_Group "Alibaba Group") announced Happy O…
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Firecrawl: Experts Have World Models. LLMs Have Word Models | Hacker News
If you tried to come up with the best way to actually predict the next token, a world model seems like an incredibly strong component.
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Firecrawl: 'World Models,' an old idea in AI, mount a comeback | Hacker News
At which point, why don’t i just do the above scan ahead X moves since i have to do the hard parts of manually building the world model anyway?<br>One area where current ai is helping is on the heuristics themselves f…
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Definitions
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#1·Apr 23, 2026GlobalWork-OK
A representation an AI builds of how the world works — its physics, objects, causality — that lets it predict and plan. Current LLMs have shaky world models; video models like Sora and Veo show emergent ones.
"Self-driving needs a real world model, not just pattern matching on pixels."
Origin: Tech / AI / developer industry term.
For parents
world model means A representation an AI builds of how the world works — its physics, objects, causality — that lets it predict and plan. It's mostly used in casual online conversation. It's casual and generally safe with friends and online. It's standard online vocabulary; nothing inherently concerning about hearing it.
For ESL learners
"world model" is slang. It means: A representation an AI builds of how the world works — its physics, objects, causality — that lets it predict and plan. Register: casual. Use it in: casual conversation and online posts. Avoid in: formal writing and professional emails.
Cluster: technology
Heard in the wild
“The three-world model is a lens of political analysis describing the world during the Cold War.”
“AMI raised $1.03 billion.[\[9\]](https://en.wikipedia.org/wiki/World_model_(artificial_intelligence)#cite_note-9) In April 2026, [Alibaba](https://en.wikipedia.org/wiki/Alibaba_Group "Alibaba Group") announced Happy Oyster, its world model designed for real-time and “flowy” world model.”
“If you tried to come up with the best way to actually predict the next token, a world model seems like an incredibly strong component.”
“At which point, why don’t i just do the above scan ahead X moves since i have to do the hard parts of manually building the world model anyway?<br>One area where current ai is helping is on the heuristics themselves for evaluating best moves when scanning ahead.”
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#2·May 2, 2026GlobalFormal
A predictive model that has been internalised by an agent which is used to forecast what consequences its actions will have on the environment (i.e. world) that it interacts with.
Cluster: technology
Source: Wiktionary (CC BY-SA 4.0)
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Why is this section here?
Slang is read by different audiences for very different reasons. The For parents view re-explains the term in plain, non-judgemental language so a caregiver can understand what their child means without needing the surrounding subculture. The For English learners view focuses on register (when it's safe to use), formal alternatives, and common mistakes — what a textbook won't teach you.
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An LLM trained or configured to produce long chains of internal "thinking" tokens before answering — trading latency for higher accuracy on complex problems. OpenAI's o1 and Claude's extended thinking are examples.
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A massive, general-purpose AI model trained on broad data, from which smaller specialized models are built. GPT, Claude, Gemini, Llama are foundation models.
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The AI architecture behind most modern image/video generators (Stable Diffusion, Sora, Veo, Midjourney). Works by progressively denoising random noise into a coherent output over dozens of steps. A parallel track to LLMs that powers generative media.