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# World-Models
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<p align="center">
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<strong>Build systems that do not only observe the world — but model how it changes.</strong>
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</p>
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<p align="center">
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<img src="https://img.shields.io/badge/Predictive-Worlds-2563EB?style=for-the-badge" alt="Predictive Worlds">
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<img src="https://img.shields.io/badge/Simulation-7C3AED?style=for-the-badge" alt="Simulation">
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<img src="https://img.shields.io/badge/Embodied-AI-14B8A6?style=for-the-badge" alt="Embodied AI">
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<img src="https://img.shields.io/badge/Planning-F59E0B?style=for-the-badge" alt="Planning">
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</p>
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---
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## A research home for learned worlds
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**World-Models** is an independent Hugging Face organization for models, datasets, benchmarks, and experiments that explore one central idea:
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> **Intelligence becomes more useful when it can represent the world, imagine alternatives, and predict consequences before acting.**
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This organization is not about one architecture.
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It is about a family of systems that attempt to learn:
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- what exists
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- what changes
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- what causes change
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- what may happen next
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- what an action is likely to produce
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---
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# The question
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Most AI systems answer:
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> **What is this?**
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World models aim to answer:
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> **What happens next?**
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And eventually:
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> **What happens if I act?**
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That shift changes the role of the model.
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It becomes less like a static predictor and more like an internal simulator.
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---
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# A minimal world model
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```text
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observation
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↓
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internal state
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↓
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dynamics model
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↓
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possible future
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```
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An action-aware world model adds one more element:
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```text
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current state
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+
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possible action
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↓
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predicted next state
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```
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Repeated over time:
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```text
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STATE₀
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↓ action
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STATE₁
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↓ action
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STATE₂
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↓ action
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STATE₃
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```
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That sequence can become the basis for planning.
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---
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# Three things matter most
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## 1. Representation
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The system needs a useful internal description of the environment.
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That representation may contain:
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- objects
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- locations
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- motion
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- geometry
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- agents
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- memory
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- uncertainty
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- goals
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- interactions
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- physical constraints
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A good representation should preserve what matters for prediction.
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---
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## 2. Dynamics
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A world is not a snapshot.
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It changes.
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A dynamics model tries to learn:
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```text
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state + action + time → next state
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```
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Possible domains include:
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- video
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- robotics
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- games
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- physical simulation
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- traffic
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- industrial systems
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- spatial environments
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- agent workflows
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---
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## 3. Imagination
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Prediction becomes powerful when a model can compare multiple possible futures.
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```text
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┌─ action A → future A
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current state├─ action B → future B
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└─ action C → future C
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```
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Planning can then ask:
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> Which future best satisfies the objective?
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---
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# Research Paths
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World-Models may explore several distinct research paths.
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### Latent world models
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Compress observations into a learned internal state.
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Possible topics:
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- latent dynamics
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- compact state spaces
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- representation learning
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- predictive embeddings
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- recurrent state models
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---
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### Video world models
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Use temporal visual data to learn how scenes evolve.
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Possible tasks:
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- future-frame prediction
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- video continuation
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- action-conditioned video
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- motion forecasting
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- object persistence
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- scene consistency
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---
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### Spatial world models
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Build representations of space and geometry.
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Possible topics:
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- 3D scenes
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- depth
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- object relations
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- navigation
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- spatial memory
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- scene reconstruction
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- viewpoint changes
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---
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### Embodied world models
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Connect perception to action.
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Possible environments:
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- robots
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- vehicles
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- drones
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- simulated agents
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- interactive environments
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The core loop:
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```text
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perceive
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↓
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model
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↓
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predict
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↓
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plan
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↓
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act
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↓
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perceive again
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```
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---
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### Agent world models
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An agent may also need a model of a digital environment.
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For example:
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- available tools
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- system state
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- task progress
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- permissions
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- external services
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- likely tool outcomes
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This creates a digital world model:
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```text
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task state
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↓
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possible action
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↓
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predicted system response
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```
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---
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# What We Want to Measure
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World models need evaluation beyond visual realism.
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A convincing future is not necessarily a correct future.
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Useful evaluation dimensions may include:
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| Dimension | Question |
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|---|---|
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| **State accuracy** | Is the internal world state meaningful? |
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| **Future prediction** | Is the next state plausible and correct? |
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| **Temporal consistency** | Does the world remain coherent over time? |
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| **Action sensitivity** | Do different actions produce different futures? |
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| **Spatial consistency** | Are geometry and positions preserved? |
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| **Object persistence** | Do entities remain stable across time? |
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| **Long-horizon stability** | Does quality degrade over many steps? |
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| **Planning utility** | Does the model help choose better actions? |
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| **Uncertainty** | Does the model represent multiple plausible futures? |
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---
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# The Prediction Horizon Problem
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Short predictions are easier.
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Long predictions accumulate error.
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```text
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t+1 ✓
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t+2 ✓
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t+3 ~
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t+4 ?
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t+5 ??
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```
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One of the most interesting world-model problems is therefore:
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> **How long can a model remain coherent when predicting into the future?**
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This matters for:
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- robotics
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- long-horizon agents
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- simulation
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- autonomous systems
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- planning
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---
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# Reality vs. Plausibility
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A world model can fail in two different ways.
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### Unrealistic prediction
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The generated future is obviously impossible.
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### Plausible but wrong prediction
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The future looks convincing, but does not match the true dynamics.
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The second failure is more dangerous because it can be harder to detect.
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World-model evaluation should therefore separate:
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**realism** from **predictive correctness**.
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---
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# Possible Spaces
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World-Models can host practical research tools such as:
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### Future State Explorer
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Enter a state and candidate actions, then compare possible next states.
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### World Model Capability Map
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Document which environments, modalities, horizons, and actions a model supports.
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### Trajectory Comparator
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Compare predicted and real object or agent trajectories.
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### Long-Horizon Stability Lab
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Measure how prediction quality changes as rollout length increases.
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### Spatial Consistency Check
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Evaluate geometry, relative position, and object persistence.
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### Action-Conditioned Simulator
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Explore how different actions affect predicted futures.
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### World Model Eval Builder
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Create structured evaluation scenarios.
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### Counterfactual Playground
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Compare “what happened” with “what might have happened.”
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### Robot Rollout Viewer
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Inspect predicted action sequences before execution.
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### Latent State Explorer
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Visualize compact internal world representations.
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---
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# Possible Datasets
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Potential datasets may include:
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```text
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state-transition-pairs
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action-conditioned-trajectories
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robot-rollouts
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spatial-scene-transitions
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synthetic-physical-worlds
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video-future-sequences
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counterfactual-transitions
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agent-environment-traces
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```
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A useful world-model dataset might include:
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```json
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{
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"observation": "...",
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"state": "...",
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"action": "...",
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"next_state": "...",
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"timestamp": "...",
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"reward": "...",
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"uncertainty": "..."
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}
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```
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---
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# Possible Models
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Projects may include models for:
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- next-state prediction
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- video dynamics
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- action-conditioned generation
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- trajectory prediction
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- latent dynamics
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- scene reconstruction
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- spatial reasoning
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- robot planning
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- environment simulation
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- predictive control
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---
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# World Models Are Not Just Video Generators
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Video generation can be part of a world model.
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But visual realism alone is not enough.
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A useful world model may need to preserve:
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- causality
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- geometry
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- identity
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- temporal state
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- physical constraints
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- action consequences
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- uncertainty
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The goal is not simply:
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> generate the next frame
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The stronger goal is:
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> **model what the world is doing**
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---
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# World Models + Omnimodal Intelligence
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A world model may receive information from many modalities:
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```text
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vision
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audio
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language
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3D
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sensors
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tools
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actions
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```
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These observations can update a shared internal state.
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That makes world models a natural bridge between:
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**omnimodal perception** and **intelligent action**.
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---
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# World Models + Spatial Intelligence
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Spatial intelligence helps represent:
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- where objects are
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- how they relate
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- how they move
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- what is reachable
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- what is occluded
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- what changes under action
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World models add the time dimension:
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> not only **where things are**, but **where they may be next**.
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---
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# World Models + Agents
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A capable agent may need to simulate consequences before acting.
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```text
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goal
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↓
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possible plan
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↓
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world model
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↓
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predicted outcome
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↓
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compare alternatives
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↓
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choose action
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```
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That may become especially important for:
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- long-horizon tasks
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- autonomous agents
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- robotics
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- tool use
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- planning under uncertainty
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---
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# Principles
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| 508 |
-
|
| 509 |
-
### Predict consequences
|
| 510 |
-
A world model should connect action and outcome.
|
| 511 |
-
|
| 512 |
-
### Preserve state
|
| 513 |
-
Important entities should remain coherent over time.
|
| 514 |
-
|
| 515 |
-
### Model uncertainty
|
| 516 |
-
The future is rarely singular.
|
| 517 |
-
|
| 518 |
-
### Evaluate rollouts
|
| 519 |
-
One-step accuracy is not enough.
|
| 520 |
-
|
| 521 |
-
### Separate realism from correctness
|
| 522 |
-
A plausible prediction can still be wrong.
|
| 523 |
-
|
| 524 |
-
### Connect perception to planning
|
| 525 |
-
Prediction becomes more useful when it improves decisions.
|
| 526 |
-
|
| 527 |
-
### Prefer measurable environments
|
| 528 |
-
World-model claims should be tested against observable outcomes where possible.
|
| 529 |
-
|
| 530 |
-
---
|
| 531 |
-
|
| 532 |
-
# Who Is This For?
|
| 533 |
-
|
| 534 |
-
World-Models may be useful for:
|
| 535 |
-
|
| 536 |
-
- world-model researchers
|
| 537 |
-
- robotics teams
|
| 538 |
-
- embodied-AI developers
|
| 539 |
-
- reinforcement-learning researchers
|
| 540 |
-
- video-model teams
|
| 541 |
-
- agent developers
|
| 542 |
-
- spatial-intelligence researchers
|
| 543 |
-
- simulation engineers
|
| 544 |
-
- autonomous-systems teams
|
| 545 |
-
- open-source contributors
|
| 546 |
-
|
| 547 |
-
---
|
| 548 |
-
|
| 549 |
-
# The Long View
|
| 550 |
-
|
| 551 |
-
Language models taught machines to model language.
|
| 552 |
-
|
| 553 |
-
World models aim at something broader:
|
| 554 |
-
|
| 555 |
-
> **model environments, dynamics, actions, and possible futures.**
|
| 556 |
-
|
| 557 |
-
If future AI systems are expected to operate in the world rather than only describe it, they may need internal predictive models that answer:
|
| 558 |
-
|
| 559 |
-
```text
|
| 560 |
-
Where am I?
|
| 561 |
-
What is happening?
|
| 562 |
-
What could happen next?
|
| 563 |
-
What if I act?
|
| 564 |
-
Which action should I choose?
|
| 565 |
-
```
|
| 566 |
-
|
| 567 |
-
That is the territory of World-Models.
|
| 568 |
-
|
| 569 |
-
---
|
| 570 |
-
|
| 571 |
-
# Research, not certainty
|
| 572 |
-
|
| 573 |
-
Projects published here are intended primarily for:
|
| 574 |
-
|
| 575 |
-
- research
|
| 576 |
-
- development
|
| 577 |
-
- evaluation
|
| 578 |
-
- simulation
|
| 579 |
-
- education
|
| 580 |
-
- prototyping
|
| 581 |
-
|
| 582 |
-
Predicted futures are not guaranteed futures.
|
| 583 |
-
|
| 584 |
-
World-model outputs should not be treated as reliable control instructions in safety-critical environments without extensive validation.
|
| 585 |
-
|
| 586 |
-
---
|
| 587 |
-
|
| 588 |
-
# Independent Organization
|
| 589 |
-
|
| 590 |
-
**World-Models is an independent Hugging Face community organization.**
|
| 591 |
-
|
| 592 |
-
It is not an official model provider, research institute, robotics company, standards organization, or Hugging Face organization.
|
| 593 |
-
|
| 594 |
-
The organization exists to explore a simple but ambitious idea:
|
| 595 |
-
|
| 596 |
-
> **AI systems that can represent a world, predict its evolution, and reason about possible futures.**
|
| 597 |
-
|
| 598 |
-
---
|
| 599 |
-
|
| 600 |
-
<p align="center">
|
| 601 |
-
|
| 602 |
-
# WORLD-MODELS
|
| 603 |
-
|
| 604 |
-
### **Represent the world. Imagine futures. Plan before acting.**
|
| 605 |
-
|
| 606 |
-
</p>
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