Zeroth · China · Compact
Bridge
An 88 cm open-source biped from Zeroth with 21 joints, Rockchip RK3588 compute and public CAD, described in a Carnegie Mellon co-authored research paper. One edition at $3,999, charged in full as a pre-order with no ship date, US shipping only. In China it sells as the Geek Edition, whose first 1,000 units sold out within a week.
$3,999
Verified this monthDelivered to United States: from $3,999 at Zeroth (OpenBridge store)
What is in the crate
3 included|4 not included
No hands, none offered
The product page claims a '2 kg payload gripper' and a 'two-finger end-effector', but the 21-joint list on Zeroth's own GitHub has no gripper joint, and every official render and the reveal film show closed, fist-like hands. Treat grasping as unconfirmed until units ship. Each arm has 4 joints (three at the shoulder, one at the elbow) and 30 to 40 cm of reach.
In the crate
Reality check
You pay the full $3,999 now for a robot with no ship date, no refund or warranty policy, no FCC ID on record and a gripper nobody has shown, from a store whose own pages disagree on its height and weight.
Can you get one, and what will it cost?
A planning estimate with machine, freight, duty, and tax shown separately.
Yes: a seller in the United States lists it, so you buy it without importing it yourself.
US authorization: We found no public FCC ID for this model. Since 28 July 2026 a foreign-made robot can be sold into the US only under an FCC authorization from before that date, so ask the seller for its FCC ID, or its Supplier's Declaration of Conformity dated before 28 July 2026, before you pay.
Spare batteries and other accessories are excluded. Confirm compatibility and pricing with the seller.
- Machinebase
- $3,999
- Freightcourier parcel
- $274 - $462
- Import duty40%
- $1,600
- Sales tax0%
- 0
- Customs clearancecarrier fee
- $17 - $67
- Import estimate to United States
- $5,890 - $6,129
About 40% on China-origin collected today: the 2.5% MFN base, 25% Section 301 List 1, and the 12.5% Section 301 forced-labor duty effective 24 Jul 2026 with no expiry. It began the same morning the 10% Section 122 surcharge lapsed, so the total rose from about 37.5% rather than falling to 27.5%. Confirm the live rate before ordering. Under review; next checked 2026-10-30.
Converted from euros at 1.1225 USD per euro (ECB reference rate, 2 October 2026): €5,247 - €5,460 in euros.
Estimate, not a quote. Every rate is shown so the maths is auditable.
Lowest delivered price
$3,999
Zeroth (OpenBridge store), a seller in the United States
Listed price, before any sales tax. About $1,891 less than the import estimate, and the seller handles the import. Preorder: confirm the delivery date with the seller.
Import requirements for United StatesConformity, battery shipping, paperwork, and source documents. Review before ordering.
Loading import requirements…
Open the import referenceWhere to buy
Catalog checked 2026-10
Individuals and companies can inquire. Confirm the configuration, stock, and delivery with the seller.
The page addresses the first batch to 'universities, research teams, and developers', but checkout asks for no affiliation. Zeroth's blog also ties the $3,999 'early-bird' price to its Bridge Builder developer program. The US store ships to United States addresses only.
Price notes: One edition on the US store at $3,999.00, charged in full at checkout by card (no deposit option), with the page's own words 'First batch now open for pre-order'. Shipping and sales tax appear only after an address is entered, and the store publishes no refund, shipping or warranty policy (those pages returned 404 on 22 Oct 2026). In China the same robot sells on JD.com as the Geek Edition at a list price of RMB 12,888, or RMB 8,888 in the launch pre-sale after an RMB 888 deposit; Chinese press reported the first 1,000 units sold out within a week of the 2 September 2026 launch.
- Zeroth (OpenBridge store) (opens in a new tab)
United States
Preorder; confirm delivery date · Checked 2026-10-22
Full $3,999.00 charged at checkout, page says 'First batch now open for pre-order', no ship date, US addresses only. No refund, shipping, warranty or terms page is published.
$3,999
Listed purchase price
Prices remain in the seller’s listed currency. Tax, freight, options, and rental periods follow each seller’s terms. A seller’s region does not guarantee delivery to your address.
How the Bridge rates
Editorial ratings based on listed specifications and sales availability. They do not measure task performance, autonomy, or reliability.
- Class
- Developer / demo platformA platform for demonstrations or robotics development. SDK access and supported tasks depend on the exact configuration.
- CapabilityHardware specification indicators
- 2/5
- Baseline: any humanoid+1
- Degrees of freedom: 21 DOF+1
- Dexterity: no hands, none offered0
- Scale: 88 cm tall0
Key specifications
Height
88 cm
Width
n/a
Depth
n/a
Weight
13 kg
Degrees of freedom
21
Battery
n/a
Payload
n/a
Top speed
0.2 m/s
Understand before you buy
Market activity
Full tracker- Zeroth launches Bridge, an open-source 88 cm biped, at $3,999 in the USLaunch
Size to scale
Drawn next to a 1.80 m (5 ft 11 in) person. Every robot on the site uses this same reference, so you can trust the comparison at a glance.
Bridge: 88 cm / 2 ft 11 in, 13 kg
About the Bridgebackground, hardware and buying reality
Bridge stands 88 cm and weighs about 13 kg by its spec table (the same page's banner says 85 cm and 10 kg), with 4 joints per arm, 6 per leg and one at the waist, and no neck joint. It runs on a Rockchip RK3588 with an MCU for motor control, a 48 V battery whose runtime Zeroth does not publish, an IMU, a microphone array and a small face display, and walks at about 0.2 m/s. Its design comes from a research paper submitted on 3 September 2026, 'BRIDGE: An Open-Source Humanoid Platform via Morphology-Control Co-Design for Physical AI', whose authors include Carnegie Mellon's Deepak Pathak and Abhinav Gupta; it reports better human-motion fidelity than the Noetix Bumi, Booster K1 and ToddlerBot. Zeroth is the consumer-robotics brand of Suzhou JoyIn Technology, which also sells the 50 cm M1. The maker's pages disagree with each other on height, weight, memory and storage, and on whether cameras are fitted.
What it does on day onewith zero programming
Per the maker: walking, squatting, lunging, gestures, dances and a backflip from its preloaded motion stack, with three teleoperation modes (a Bluetooth controller, upper-body following in VR, and whole-body teleoperation). No customer unit has shipped outside China, and no independent hands-on review exists yet, so none of this is confirmed.
Best for: Researchers and developers who want a low-cost, open-hardware biped for whole-body control and motion-imitation work, and who can wait for a first batch whose software is still being published.
Documented uses
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