Amazon’s fleet of warehouse robots just hit a new milestone. The company announced Monday that it deployed its millionth bot to begin operations at a fulfillment center in Japan.

Amazon’s ambitions for robot use have long surpassed the company utilizing them for delivery service. The business juggernaut is the world’s leading manufacturer of mobile robotics, and aims to sell them to you for use at home as well — if you have $1,600 to spare.

The robotic workers operate in over 300 Amazon warehouses across the world, creating an ever-expanding automated delivery network. More than 75% of Amazon’s global deliveries are assisted in some way by robot automation, according to a report by the Wall Street Journal.

Amazon has also developed a new generative AI model called DeepFleet to make the robots in the delivery system “smarter and more efficient.” According to Amazon, this new model will coordinate robots across the fulfillment network to improve package travel times by 10%.

The company’s robots currently lift thousands of pounds of packages at a time, integrate conveyor belts to move along individual items and move autonomously around the warehouse with heavy carts. 

The most recent fleet upgrade, Vulcan, uses force feedback sensors to create a sense of touch, physically lifting and moving items all by itself.

Amazon’s robots work in tandem with more than 1.6 million human workers worldwide. The Wall Street Journal reports that Amazon is on track to have more automated workers than employed humans, while Amazon workers have begun to unionize in recent years.

A representative for Amazon did not immediately respond to a request for comment.