K2 Bumblebee by Kepler vs Green by Sberbank

The two robots weigh the same at 75 kg, and Green is a little taller at 180 cm versus 175 cm. K2 Bumblebee has more joints, 52 against Green's 41, and uses planetary roller screw actuators for precise movement. Green dedicates 12 joints to its fingers and 4 to its wrists. K2 Bumblebee's safety features include emergency stop, obstacle avoidance, disturbance-resistant gait and force feedback for safe interaction. K2 Bumblebee's sensors include RGB cameras, infrared binocular 3D cameras, stereo cameras and tactile sensors in every finger.

K2 Bumblebee walks at up to 5 km/h, faster than Green's listed top speed of 0.9 m/s (about 3.2 km/h). Both walk on two legs and navigate on their own; Green orients itself in unfamiliar indoor spaces and steers around obstacles. K2 Bumblebee reaches 1.4 m/s. Green's mobility type is legged. K2 Bumblebee has 52 degrees of freedom, carries 15 kg per arm and can deadlift 30 kg. Green has 41 degrees of freedom. K2 Bumblebee weighs 75 kg. Green stands 180 cm tall and weighs 75 kg.

K2 Bumblebee combines tactile sensors in every finger with RGB, infrared binocular 3D and stereo cameras, LiDAR, an IMU and force sensing. Green uses eight RGB cameras, two LiDARs, inertial sensors and force-torque sensors in its fingertips. Both have touch-sensitive hands, and K2 has the larger and more varied sensor set, while Green's two LiDARs and eight cameras give wide coverage. K2 also reaches 5 km/h, against Green's 0.9 m/s, so it covers more ground.

K2 Bumblebee runs AI with SLAM, object recognition and gesture detection, controlled by autonomous AI, natural language, remote control and an app, and it learns through reinforcement learning, motion learning and VLA task programming. Green pairs Sber's GigaChat for conversation with Green-VLA, a vision-language-action model of about 1.3 billion parameters released with open weights, and it can correct its own mistakes. K2 is built for industrial tasks with voice and app control, and Green for conversation and self-correction.

K2 Bumblebee runs about 8 hours on a 2.5 kWh swappable battery and charges in 2 hours. Green runs on an onboard rechargeable 48 V battery. Both weigh 75 kg, so they carry the same mass, but K2 walks at up to 5 km/h and Green at 0.9 m/s (about 3.2 km/h). K2 is the better-documented choice for long shifts, and its modular battery pack lets a spare keep it working continuously.

K2 Bumblebee targets sorting, assembly, loading and unloading, guided tours and factory inspections, with 15 kg per arm and a 30 kg dual-arm deadlift. Green targets collecting items and stocking shelves, assembling and packing products, lab work with test tubes and bio samples, and room service and cleaning. Both suit retail and light manufacturing, with K2 carrying heavier loads and Green adding lab handling and hotel service.

K2 Bumblebee runs Kepler OS, a Linux-based system with ROS compatibility and APIs for vision, motion and voice integration. Green's software is Sber's GigaChat plus the open-weight Green-VLA model, and Sber's Green Challenge lets outside teams train controllers in a simulator of the robot. K2 suits developers who want documented APIs for industrial applications, while Green's open weights suit researchers who want to adapt the model itself.

K2 Bumblebee is listed at $50,000 to $70,000. Sber has not announced a price or public sales for Green; it plans business pilots and expects a line of Green robots by autumn 2026. Green is aimed at retail, catering, manufacturing, laboratories and room service. Green talks through Sber's GigaChat model and handles objects with the Green-VLA model. Sber unveiled it at AI Journey 2025 in Moscow. Green stands 180 cm tall and weighs 75 kg. Green's control is listed as autonomous, with GigaChat and Green-VLA AI models and voice commands.

K2 Bumblebee uses a disturbance-resistant gait, force feedback, obstacle avoidance and an emergency stop. Green relies on inertial and force sensors for balance, avoids obstacles and can catch its own errors; Sber has not published safety certifications. Green's navigation relies on camera and LiDAR perception that lets it move around obstacles. Green walks on two legs. Green is built for indoor work in shops, catering, factories, laboratories and hotel rooms. Green stands 180 cm tall, weighs 75 kg and has 41 degrees of freedom.