Sanctuary AI Phoenix vs UBTech Robotics Walker S2

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Dataset date: 2026-11-03

175 cmhuman

170 cm²Sanctuary AI Phoenix

176 cm⁴UBTech Robotics Walker S2

Height to scale. Width is schematic, derived from weight; not a measured body width.

claimed → demonstrated
demonstrated
first delivery recorded

Evidence sheet

Only differences Showing all 20 rows

Evidence sheet, scrolls horizontally below 900px
Property	Sanctuary AI Phoenix	UBTech Robotics Walker S2	Difference
Height (cm)	170 cm² Not reviewed The cited source has not been reviewed for this specific claim.	176 cm⁴ Not reviewed The cited source has not been reviewed for this specific claim.	+6 cm
Weight (kg)	57.9 kg⁵ Not reviewed The cited source has not been reviewed for this specific claim.	sources disagree	unknown on one side
Degrees of freedom	20⁶ Needs review The reviewed source does not provide enough evidence for this specific claim. Reason The reviewed source did not establish both the exact recorded value and the concrete robot variant for this specification. Checked 2026-09-27 Review method Text review Media type Article Publisher relation Independent source	52⁷ Needs review The reviewed source does not provide enough evidence for this specific claim. Reason The reviewed source did not establish both the exact recorded value and the concrete robot variant for this specification. Checked 2026-09-27 Review method Text review Media type Article Publisher relation Independent source	+32 DoF
Walking speed (km/h)	4.8 km/h⁸ Not reviewed The cited source has not been reviewed for this specific claim.	no sourced value	unknown on one side
Payload (kg)	20.5 kg¹ Not reviewed The cited source has not been reviewed for this specific claim.	15 kg³ Not reviewed The cited source has not been reviewed for this specific claim.	-5.5 kg
Battery runtime (min)	no sourced value	sources disagree	no sourced value
Hands	no sourced value	no sourced value	no sourced value
Actuator torque (Nm)	no sourced value	no sourced value	no sourced value
Battery (Wh)	no sourced value	sources disagree	no sourced value
Battery swappable	no sourced value	yes⁹ Not reviewed The cited source has not been reviewed for this specific claim.	unknown on one side
Locomotion	bipedal¹⁰ Not reviewed The cited source has not been reviewed for this specific claim.	sources disagree	unknown on one side
SDK / ROS	no sourced value	no sourced value	no sourced value
Simulation	No simulation artifact confirmed in targeted search This records a searched-but-not-confirmed result. It does not mean simulation support is unavailable. Search checked 2026-09-27 Search result Targeted searches found no confirmed model for this record; does not mean unavailable. Searched source 1	No simulation artifact confirmed in targeted search This records a searched-but-not-confirmed result. It does not mean simulation support is unavailable. Search checked 2026-09-27 Search result Targeted searches found no confirmed model for this record; does not mean unavailable. Only a Walker S2 EDU model was found; equivalence to the commercial Walker S2 record was not established. Searched source 1	—
Actuator architecture	No actuator architecture confirmed in targeted search This records a searched-but-not-confirmed result. It does not mean a particular architecture is absent. Search checked 2026-09-27 Search result Targeted actuator searches did not confirm an exact-variant architecture claim for this record; this does not mean none exists. Searched source 1	No actuator architecture confirmed in targeted search This records a searched-but-not-confirmed result. It does not mean a particular architecture is absent. Search checked 2026-09-27 Search result Targeted actuator searches did not confirm an exact-variant architecture claim for this record; this does not mean none exists. Searched source 1	—
Warranty (shortest–longest)	no sourced value	no sourced value	no sourced value
Order type	quote required¹¹ Not reviewed The cited source has not been reviewed for this specific claim.	quote required¹² Not reviewed The cited source has not been reviewed for this specific claim.	—
Latest price	no sourced value	no sourced value	no sourced value
Announced	2023-05-16² Not reviewed The cited source has not been reviewed for this specific claim.	2025-07-23¹³ Not reviewed The cited source has not been reviewed for this specific claim.	+26 mo
Recorded first customer delivery	no sourced value	no sourced value	no sourced value
Recorded delivery status	Recorded demonstrated	Recorded claimed	—

Capabilities

Capabilities table
Capability	Sanctuary AI Phoenix	UBTech Robotics Walker S2
Teleoperation shown	T¹⁴ Needs review The reviewed source does not provide enough evidence for this specific claim. Reason The text source was reviewed, but no video segment was watched; the existing capability status and autonomy classification for the exact recorded robot variant were not fully verified. Checked 2026-09-27 Review method Text review Media type Article Publisher relation Independent source	—

Notes

55 lbs (20.5 kg) (accessed 2026-09-20) — source
5'7″ (1.7 m) (accessed 2026-09-20) — source
pitch 125° angle and handle 15kg payload within 0-1.8 meters workspace (accessed 2026-09-20) — source
stands at an impressive height of 1.76 meters (accessed 2026-09-20) — source
155 lbs (57.9 kg) (accessed 2026-09-20) — source
20 degrees of freedom (accessed 2026-09-27) — source
52 degrees of freedom in its bionic body (accessed 2026-09-27) — source
3 mph (1,300 mm/sec) (accessed 2026-09-20) — source
swap battery autonomously within 3 minutes (accessed 2026-09-21) — source
The Phoenix model is the sixth generation of the platform and is the first robot model to be complete with legs and worthy of being characterized as a 'humanoid' bipedal robotic system. (accessed 2026-09-21) — source
Contact us to get in touch with a member of our commercial team. (accessed 2026-09-21) — source
Please reach out for more request or become a partner! (accessed 2026-09-21) — source
On July 23rd, UBTECH Robotics announced the launch of its latest innovation, the Walker S2 (accessed 2026-09-20) — source
the primary use case for our touch sensors is to speed up teleoperation activity (accessed 2026-09-27) — source

Cite this comparison: https://humanoidrecord.com/compare/sanctuary-ai-phoenix-vs-ubtech-walker-s2/ (data snapshot 2026-11-03)

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