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Walden Robotics spun out of Toyota Research Institute in January and had humanoid robots running eight-hour production shifts by February — a timeline almost unheard of in the field. In July, the Cambridge startup announced a $300 million seed round at a $1.1 billion valuation, backed by Toyota, NVIDIA, Boeing, and Samsung. This episode looks at the Large Behavior Model technology behind the robots, the team that built it, and the open question of whether performance inside Toyota's plants can translate anywhere else.