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Sony AI’s autonomous robot Ace has reached expert-level play in table tennis, competing under International Table Tennis Federation rules at an Olympic-sized court in Tokyo and sometimes defeating top human opponents, according to a study published in Nature on April 22, 2026.
Built around an eight-jointed arm and a high-speed vision suite (nine cameras plus three gaze systems), Ace uses model-free reinforcement learning trained in simulation and proprietary control software to track spin, predict trajectories and react in about 20 milliseconds.
In April 2025 it beat three of five elite players (who train ~20 hours weekly) and initially lost to two professionals; Sony AI says the robot later beat professional players in December 2025 and again in March 2026, including matches against top-ranked competitors such as Miyuu Kihara.
Licensed umpires officiated matches and researchers emphasise parity constraints to avoid unfair hardware advantages.
The team says the methods could transfer to manufacturing, service robotics, entertainment and other safety-critical, high-speed human-robot interaction tasks.








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