← All comparisons · All bipeds · Robot Glossary

Kid-Size Humanoid Robot Comparison ($4,900 to $9,000) Unitree R1 vs Mini Pi+ vs Booster K1 vs BRUCE vs Bumi EDU

Comparison of five kid-size walking humanoids, 68 to 123 cm tall, that can be ordered for US delivery for about $4,900 to $9,000. All walk with reinforcement-learned or model-based controllers on brushless leg actuators, and are aimed at labs and developers. They differ most in how much of the robot is open to research code at this price, from full low-level torque control to a closed robot whose SDK needs a pricier tier. Ordered by starting price, with the cheapest version of each that can be ordered compared.

Comparison table

Unitree R1UnitreeMini Pi+HighTorque RoboticsBooster K1Booster RoboticsBRUCEWestwood RoboticsBumi EDU-ProNoetix Robotics
Price
Price range$4,900 / $5,900 / $10,500From $5,500$5,999 – $16,999$8,950~$1,400 (China) · $4,045+ US gray market
Version comparedR1 Air $4,900 (R1 $5,900)Base $5,500 (Pro $7,500 adds a Jetson and depth camera)Geek $7,500–7,980 from US resellers (Booster lists $5,999 by sales inquiry)BRUCE $8,950EDU-Pro $8,995
Version needed for research codeEDU, $10,500 direct or $15,950 from RoboStore USBase already has the full SDKEvery tier has the SDKSingle version, openEDU-Pro (compared). EDU-Air $9,995 has no onboard Jetson
Also neededFreight $300–1,200 and import duties (direct orders)Shipping and duties not statedA 5 Ah battery for longer sessions (Geek ships with 2 Ah)Spare batteries (about 20 min each)Import duties may be due on delivery
Body
Height123 cm68 cm95 cm70 cm98 cm
Weight27 kg (Air), 29 kg (R1)15.4 kg19.5 kg4.8 kg~17 kg
Leg / total DOF6 per leg / 20 (Air), 26 (R1)6 per leg (unconfirmed) / 226 per leg / 225 per leg / 166 per leg / 21
Leg actuatorsUnitree brushless joint motorsHighTorque brushless joint modules, CAN-FD, 21 N·m peakBrushless, 60 N·m peakProprioceptive Koala BEAR actuators, liquid-cooled kneesBrushless, 70 N·m knee
Top speedNot published1.1 m/s0.4 m/s rated walkNot published0.5 m/s
BatteryAbout 1 h, swappable ($500 spare)4.5 Ah, about 1 h2 Ah, about 30 min (5 Ah, 80 min on EDU and Pro)3 Ah, about 20 min5.1 Ah quick-release, 2–3 h
Research
Onboard compute8-core CPU (Jetson Orin NX on EDU only)RK3588 (Pro adds a Jetson Orin NX)48 TOPS board on the GeekKhadas Edge2 (RK3588S)Jetson Orin Nano Super (67 TOPS) plus a closed RK3576 motion board
CamerasMono (Air), stereo (R1)None on Base (Pro adds RealSense D435i)Stereo depth cameraNoneRealSense D435i depth camera
Low-level joint controlEDU onlyYes, 1 kHz torqueYesYes, controller source for customersYes, 500 Hz
Official RL training codeunitree_rl_mjlab (MuJoCo), deploying needs EDUIsaac Lab AMP and BeyondMimic reposbooster_gym and booster_train (Isaac Lab) with booster_deployNone publishednoetix_bumi_lab, EDU only, not public
Simulation modelsMuJoCo, URDF for IsaacMuJoCo, Isaac Lab, GazeboMuJoCo, Isaac Lab, URDFMuJoCo, Gazebo (runs the real controller)Community MuJoCo model only
ProgrammabilityFull SDK on pricier tier onlyFull SDKFull SDKOpen source (hardware + software)Full SDK on pricier tier only
Purchasing
Where to buyUnitree store (from China), or RoboStore US ($8,990 R1)HighTorque store (from China)US resellers such as Robotix Market and Robify (Booster takes inquiries only)Westwood Robotics storeRobotix Market (from China), AIFITLAB
Shipping to the USWithin 30 business days direct, duties extraTakes orders online, shipping time not publishedRobify ships within 15 business daysIn stock, ships in about 5 business days, duties prepaidDispatch in 0–45 days plus transit
Suggested ages18+18+18+18+16+

Highlighted cells are the strongest in their row. Speeds marked (est.) are not published by the maker. They come from owner measurements or the makers' gait code, explained on each robot page. Prices are US list prices as of September 2026. Each robot's page has full specs, sources and photos.

Which one fits

The robots