RankedUnitree A2 vs Unitree B2-W
Key facts
Unitree A2 (Unitree Robotics; Shipping) and Unitree B2-W (Unitree Robotics; Shipping) are both quadruped robot (robot dog)s. Published figures: weight 42 kg (93 lb) vs 85 kg (187 lb); speed 3.7 m/s (13.3 km/h · 8.3 mph) vs 4.17 m/s (15 km/h · 9.3 mph); payload 25 kg (55 lb) vs 40 kg (88 lb). Published for only one of them: runtime (Unitree A2: 3 h–5 h); degrees of freedom (Unitree A2: 12). Price: Unitree A2 US$100,000, Official store (global) (official price); Unitree B2-W US$100,000, Official store (global) (official price). Robot 500: Unitree A2 #9 (score 69.7), Unitree B2-W #27 (score 64.5). Disclosure: Unitree A2 has 22 sourced values (81% of tracked fields), Unitree B2-W has 17 (65%).
Cite: RankedRobot, https://rankedrobot.com/compare/unitree-a2-vs-unitree-b2-w/ (checked 2026-09-25) · Every figure below links to its source · Unitree A2 spec sheet · Unitree B2-W spec sheet
| Spec | Unitree A2 | Unitree B2-W |
|---|---|---|
| Status | Shipping | Shipping |
| Price | US$100,000, Official store (global) (official price) source | US$100,000, Official store (global) (official price) source |
| Robot 500 | #9 · 69.7 | #27 · 64.5 |
| Launch | ||
| Announced | ||
| Status | ||
| Body | ||
| Dimensions | ||
| Weight | ||
| Form factor | ||
| IP rating | ||
| Mobility | ||
| Max speed | 3.7 m/s (13.3 km/h · 8.3 mph)ManufacturerSource: unitree.com (2026-09-25)Conditions: sustained speed as stated; page separately lists an up-to ~5 m/s figure | 4.17 m/s (15 km/h · 9.3 mph)ManufacturerSource: unitree.com (2026-09-25)Conditions: sustained speed as stated (wheeled mode) |
| Stairs | Stairs of 20-25cm continuous; 40cm forward obstacle; climb angle >45 degManufacturerSource: unitree.com (2026-09-25) | |
| Joints & payload | ||
| Degrees of freedom | ||
| Payload | ||
| Peak load | ||
| Compute & AI | ||
| Processor | Intel Core i5 (standard) / i7 (dev) or NVIDIA Jetson Orin NX (configurable)ManufacturerSource: unitree.com (2026-09-25) | |
| AI performance | ||
| Teleoperation | ||
| Sensors | ||
| Cameras | ||
| LiDAR | ||
| Microphones | Not tracked | |
| Power | ||
| Battery | ||
| Runtime | 3 h–5 hManufacturerSource: unitree.com (2026-09-25)Conditions: unloaded continuous walking; loaded (25kg) figure is >3h/~12.5km | |
| Hot-swappable battery | ||
| Software | ||
| SDK | Unitree SDK2 (unitree_sdk2, C++/Python) with ROS2 support (unitree_ros2)ManufacturerSource: support.unitree.com (2026-09-25) | Unitree SDK2 (unitree_sdk2, C++/Python) with ROS2 support (unitree_ros2)ManufacturerSource: support.unitree.com (2026-09-25) |
| Commercial | ||
| Regions sold | ||
Confidence labels: Manufacturer = stated by the maker · Verified = independently confirmed · Reported = credible media or retailer, not confirmed by the maker · ⚠ Unconfirmed = leak or single source · Not disclosed = not published. We never estimate missing figures. Add more robots to this comparison.
Quick answers
What is the difference between the Unitree A2 and the Unitree B2-W?
Published figures: weight 42 kg (93 lb) vs 85 kg (187 lb); speed 3.7 m/s (13.3 km/h · 8.3 mph) vs 4.17 m/s (15 km/h · 9.3 mph); payload 25 kg (55 lb) vs 40 kg (88 lb). Published for only one of them: runtime (Unitree A2: 3 h–5 h); degrees of freedom (Unitree A2: 12).
Which is cheaper, the Unitree A2 or the Unitree B2-W?
Price: Unitree A2 US$100,000, Official store (global) (official price); Unitree B2-W US$100,000, Official store (global) (official price). Prices are shown exactly as published, never converted or estimated.
Which ranks higher in the Robot 500, the Unitree A2 or the Unitree B2-W?
Robot 500: Unitree A2 #9 (score 69.7), Unitree B2-W #27 (score 64.5). Method: https://rankedrobot.com/robot500/#method
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