A world model is an AI system that learns a predictive representation of how an environment changes over time. It can use observations, actions, or language to estimate future states and possible outcomes before an agent acts. World models support planning in model-based reinforcement learning, robotics, embodied AI, autonomous driving, and interactive simulation. This site catalogs these systems with model records, research papers, benchmark context, and source links. Start with the world models database, compare systems on the leaderboard, or read the Performance Index methodology.
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A world model that uses diffusion processes to predict future observations. DIAMOND showed that diffusion-based world models can achieve state-of-the-art Atari 100K results, while Cosmos applies diffusion at foundation scale for physical AI.
Diffusion World Model is a glossary concept in the architecture layer of the world models knowledge base.
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| Attribute | Value |
|---|---|
| Term | Diffusion World Model |
| Category | Architecture |
| Definition | A world model that uses diffusion processes to predict future observations. DIAMOND showed that diffusion-based world models can achieve state-of-the-art Atari 100K results, while Cosmos applies diffusion at foundation scale for physical AI. |
| Related Models | 2 |
| Related Research | 2 |
| Model | Lab | Category |
|---|---|---|
| DIAMOND | Microsoft Research / University of Geneva | Model-Based RL |
| NVIDIA Cosmos | NVIDIA | Foundation World Model |
| Topic | Summary |
|---|---|
| Model-Based Reinforcement Learning | What model-based reinforcement learning is, how world models enable imagination-based planning, and why Dreamer, MuZero, PlaNet, and TD-MPC2 matter. |
| Foundation World Models | How foundation world models such as Cosmos and Genie 2 bring large-scale learned simulation to robotics, autonomous driving, and physical AI. |
| Term | Category | Definition |
|---|---|---|
| Diffusion Model | Architecture | A generative model that learns to produce data by reversing a gradual noising process. In world models, diffusion-based architectures (used in NVIDIA Cosmos and UniSim) generate high-fidelity video frames representing possible future states of the environment. |
| Action Conditioning | Architecture | A property of a world model whose predictions of future states depend explicitly on the action taken by the agent. Action-conditioned models support interactive simulation and planning, distinguishing true world models from passive video generators. |
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Published by world-models.io editorial board.
Lead editor Bernard Grenat.
This glossary page publishes stable definitions linked to related models, research topics, and primary-source context.
Each editorial page is assembled from primary sources, normalized into extractable summaries, checked for factual drift, and reviewed before publication or major refreshes. Last reviewed: 2026-09-27.
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