The International Atomic Energy Agency’s _World Fusion Outlook 2025_ report says there are more than 160 fusion devices now either operational, under construction or planned.

The agency’s Director General, Rafael Mariano Grossi, says in his foreword to the third edition of the yearly report that these devices range from "pilot plants aiming for demonstration in the near term to larger scale facilities laying the foundations for future industrial deployment".

He said that "what was once confined to experimental research and long-term aspirations is now rapidly becoming a cornerstone of national energy strategies and industrial planning ... fusion energy is entering a new phase of real-world implementation".