HumanoidKepler Robotics (Shanghai Kepler Exploration Robot Co.)2024CN

Kepler Forerunner K2 "Bumblebee"

Name: Kepler Forerunner K2 "Bumblebee"
Brand: Kepler Robotics (Shanghai Kepler Exploration Robot Co.)

175 cm industrial humanoid with hybrid roller-screw linear and rotary actuation, aimed at repetitive factory and logistics work.

activeBuyL0 Indexednot buildable

Difficulty index

11.5/13

11.5

Index breakdown
Class	humanoid	+5
Cost	$30k list	+2.5
DOF	52 DOF	+3
Parts	unknown · midpoint	+1

How the index works

Top of the ladder. This robot lives on the humanoid domains.

humanoidrobots.systems/kepler/k2 ↗
Full spec sheet and comparisons
humanoidrobot.build/kepler/k2
Closed hardware. Buy link only.
humanoidrobots.training/kepler/k2
No public URDF or MJCF.

Specimen photographs

2 items

Kepler Robotics K2 Bumblebee Enters Mass ProductionKepler Humanoid Robot · official video, embedded · source
Kepler K2 “Bumblebee” Impresses at the 2025 Zhangjiang Embodied AI ExpoKepler Humanoid Robot · official video, embedded · source

Spec card

10/13 known

Degrees of freedom: 52
Height: 175 cm
Mass: 75 kg
Payload: 30 kg
Runtime: 480 min
Battery: 2330 Wh
Price: $30k · Base model US$30,000 per The Robot Report (ICRA 2025); some reports cite RMB 248,000.
Actuators: Hybrid roller-screw linear + rotary actuators
Compute: 100 TOPS onboard
Sensors: 80+ integrated sensors; tactile dexterous hands

Not in the registry: speed, bom total, part count. Left blank rather than guessed.

What you learn building it

+Whole-body controlclass: humanoid
+Dozens of actuators on one busclass: humanoid
+Balance and fall handlingclass: humanoid
+Safe bring-up of a full-size machineclass: humanoid

Openness

0/100

not publicCAD
not publicBOM
not publicFirmware
not publicSim model
not publicSoftware
not publicPolicies

Score 0/100 computed from what is public: CAD 25, BOM 20, sim 20, firmware 15, software 10, policies 10.

Repos & models

Site

Build it

Closed hardware. Buy link only.

humanoidrobot.build/kepler/k2 · Closed hardware. Buy link only.

Simulate

humanoidrobots.training/kepler/k2

No public URDF or MJCF.

Next rung

None. This is the top. Find people building it on humanoidrobots.team.

This is the top of the ladder.

NoteThe Forerunner K1 launched Nov 2023, and the K2 debuted at GITEX Oct 2024 before being rebranded 'Bumblebee'. Mass production was announced Sept 2025. Payload is 15 kg per arm (30 kg dual). The 2.33 kWh battery figure is from secondary aggregators. Runtime is up to 8 h on a 1 h charge.

Sources

[1]The Robot Report K2 at ICRA 2025checked 2026-09-24
[2]PR Newswire K2 debutchecked 2026-09-24