K2 Bumblebee

Overview

The Kepler K2 Bumblebee is an industrial humanoid robot developed for deployment in structured factory environments. Public demonstrations show bipedal locomotion, bimanual manipulation, and integration with industrial workflows. Detailed endurance and performance benchmarks have not been independently verified.

K2 Bumblebee stands 175 cm tall, weighs 75 kg, and has 52 degrees of freedom with more than 80 integrated sensors, according to Kepler Robotics. Each arm supports 15 kg payload; combined two-arm payload is 30 kg. Onboard compute is rated at 100 TOPS. The actuation system uses proprietary planetary roller screw actuators in a series-parallel hybrid architecture — Kepler describes this as enabling a straight-knee walking gait with high torque density. Battery runtime is up to eight hours on a one-hour charge. Each hand has 11 degrees of freedom, 25 force-sensing contact points per finger, and a six-axis force/torque sensor at the wrist.

The robot's AI runs a layered VLA+ model for natural language task interpretation, semantic recognition, and motion planning. Locomotion training used GPU-accelerated reinforcement learning in simulation before transfer to hardware. Kepler states over 80% of core hardware is developed and manufactured in-house.

The K2 Bumblebee debuted at the SAIC-GM automotive plant in Shanghai in April 2025 and appeared publicly at ICRA 2025 in Atlanta in May 2025. Base pricing is listed at $30,000 — among the lowest published prices for a full-size industrial humanoid. Kepler describes the robot as in limited-series production as of mid-2025, targeting intelligent manufacturing, warehousing, logistics, research, and education.

Specifications

Sensors

Software