Boston Dynamics on November 3 unveiled Stretch Gen 2, a redesigned version of its autonomous trailer-unloading robot built to cut downtime and speed maintenance in high-volume logistics operations1,2.
The upgrade draws on data from more than 100,000 operating hours and tens of millions of boxes unloaded by the first-generation Stretch, which Boston Dynamics calls the market leader in robotic unloading with more deployments than any competing product.
Reliability-first redesign
Stretch Gen 2 eliminates 81 percent of its predecessor's internal cabling — roughly half a mile's worth — and replaces connectors with heavy-duty automotive-grade alternatives. The robot features continuous-rotation joints that move beyond 360 degrees without hitting hard stops, a redesigned gripper with new valve systems and more precise sensing, and exterior panels re-engineered to withstand falling boxes. Boston Dynamics also repositioned the emergency stop button to reduce accidental safety stoppages.
Modular construction enables what Boston Dynamics describes as plug-and-play part swaps. A complete swerve-drive swap now takes approximately one hour, down from a full day on the prior model. Onboard diagnostics and maintenance tools let customers' own teams handle routine servicing.
"Our customers count on Stretch to keep freight moving, and every hour a robot sits idle is an hour of work that piles up on the dock," said Brian Donnelly, Vice President & General Manager of Logistics Robotics at Boston Dynamics. "With Gen 2, we focused on the things that actually took robots offline in the real world. We made it tougher, we made it simpler to service, and we made sure it keeps getting better long after it's deployed".
Software-defined improvement loop
Stretch Gen 2 runs on a redesigned onboard computing platform that supports continuous software updates without hardware changes. Boston Dynamics said regular software releases will improve case detection, motion planning, picking strategies, and world modeling across deployed fleets. A pre-trained vision system detects most packages from day one with no additional programming required.
The robot's battery is designed to last two work shifts, with a fast charger restoring 90 percent charge in approximately 75 minutes. Onboard lighting allows operation inside dark trailers. Boston Dynamics said Stretch Gen 2 can unload up to 1,000 cases per hour.
Broader robotics context
The launch comes days after Hyundai Motor Group, Boston Dynamics' parent, disclosed that its subsidiary Hyundai Mobis would begin prototype actuator production for Boston Dynamics' humanoid robot Atlas[1]. Boston Dynamics lists three robots in its current portfolio: Spot, Stretch, and Atlas.
ANALYSIS The Gen 2 redesign centers on operational reliability rather than new autonomy capabilities, targeting the mechanical and electrical failure modes that field data identified as the primary sources of unplanned downtime. The over-the-air software architecture positions the hardware as a long-lived platform whose perception and planning stack can improve post-deployment.