Cyborg Index · July 2026

UBTech Walker S vs XPeng IRON

Both humanoids read on the same 8 axes and 40 sub-axes, using the published Index scores. Every difference below carries the public evidence behind it, and sub-axes with no public evidence count as 0 rather than being skipped.

The public record is still thin on at least one side of this pair, so treat the ordering as provisional rather than settled.

Overall standing

Capability score · 0–5 over 40 sub-axes

UBTech Walker S

UBTech

1.70of 5

Rank

Coverage

29/40

Proof

0.13

XPeng IRON

XPeng

0.47of 5

Rank

#12

Coverage

11/40

Proof

0.01

The short answer

UBTech Walker S scores 1.23 higher than XPeng IRON, but that lead rests mostly on vendor claims and demos.

Only 8% of UBTech Walker S's score is carried by independently verified material — the rest is claimed or shown in demos. XPeng IRON has more unscored ground than the gap between them, so this could change next month.

Where UBTech Walker S is ahead

HRI+2.20Rests on claims and demos
Autonomy+2.00Rests on claims and demos
Deployment+2.00Rests on claims and demos
Locomotion+1.20Rests on claims and demos

Where XPeng IRON is ahead

Not ahead by enough on any axis to be worth reporting.

What would change it

18 sub-axes on the trailing side have no public evidence yet. If all of them scored full marks they would be worth 2.25 — against a gap of 1.23.

HRI · Safe proximityup to +0.125
Locomotion · Uneven terrainup to +0.125
Locomotion · Stairsup to +0.125
Locomotion · Speed enduranceup to +0.125
Manipulation · Force controlup to +0.125

There is more unscored ground than there is gap, so this result could turn over after the next research month.

How much we know

50%of sub-axes covered

We have public evidence for 50% of the 40 sub-axes across these two.

UBTech Walker S · 73%

XPeng IRON · 28%

The shape of each score

UBTech Walker S1.70

29/40 sub-axes have evidence

Faint outline = XPeng IRON

XPeng IRON0.47

11/40 sub-axes have evidence

Faint outline = UBTech Walker S

Reading the wheels — clockwise from the top

1 Locomotion
2 Manipulation
3 Perception
4 Autonomy
5 Learning
6 HRI
7 Deployment
8 Safety

Each wheel has 40 spokes — five per axis. A longer spoke is a higher score, and the dashed rings mark 1 to 4. Hover or tab onto any spoke to read the axis, the sub-axis and the exact value. A missing spoke means there is no public evidence for that sub-axis yet, which is not the same as scoring zero. The faint outline on each wheel is the other humanoid, drawn on the same scale.

Every axis, every sub-axis

HRI2.20 Autonomy2.00 Deployment2.00 Locomotion1.20 Manipulation1.20 Perception0.60 Safety0.60 Learninglevel

UBTech Walker SXPeng IRON

Shared 0–5 track · widest gap first

HRI

2.80 / 0.60◄ 2.20

Rests on claims and demosEvidenced cells · 5/5 vs 1/5

Speech io

2.00 / —◄ 2.00

Nl instruction

2.00 / —◄ 2.00

Intent recognition

2.00 / —◄ 2.00

Safe proximity

4.00 / —◄ 4.00

Social presentation

4.00 / 3.00◄ 1.00

Autonomy

2.00 / 0.00◄ 2.00

Rests on claims and demosEvidenced cells · 5/5 vs 0/5

Unattended operation

1.00 / —◄ 1.00

Task horizon

3.00 / —◄ 3.00

Generalization

2.00 / —◄ 2.00

Instruction following

2.00 / —◄ 2.00

Recovery from failure

2.00 / —◄ 2.00

Deployment

2.60 / 0.60◄ 2.00

Rests on claims and demosEvidenced cells · 4/5 vs 2/5

Named pilots

3.00 / 2.00◄ 1.00

Field hours

— / —

Customer diversity

4.00 / 1.00◄ 3.00

Supportability

2.00 / —◄ 2.00

Commercial posture

4.00 / —◄ 4.00

Locomotion

1.60 / 0.40◄ 1.20

Rests on claims and demosEvidenced cells · 4/5 vs 1/5

Flat ground walking

2.00 / 2.00

Uneven terrain

2.00 / —◄ 2.00

Stairs

2.00 / —◄ 2.00

Disturbance recovery

— / —

Speed endurance

2.00 / —◄ 2.00

Manipulation

1.80 / 0.60◄ 1.20

Rests on claims and demosEvidenced cells · 4/5 vs 2/5

Grasp variety

2.00 / 2.00

Bimanual

3.00 / 1.00◄ 2.00

Force control

2.00 / —◄ 2.00

In hand reorient

— / —

Tool use

2.00 / —◄ 2.00

Perception

1.60 / 1.00◄ 0.60

Rests on claims and demosEvidenced cells · 4/5 vs 3/5

Sensor stack

2.00 / 2.00

Scene understanding

2.00 / 1.00◄ 1.00

Spatial memory

2.00 / —◄ 2.00

Object permanence

— / —

Semantic world model

2.00 / 2.00

Safety

0.80 / 0.20◄ 0.60

Rests on claims and demosEvidenced cells · 2/5 vs 1/5

Functional safety

2.00 / 1.00◄ 1.00

Certifications

— / —

E stop arch

— / —

Incident transparency

— / —

Force impact limits

2.00 / —◄ 2.00

Learning

0.40 / 0.40

Not enough public record yetEvidenced cells · 1/5 vs 1/5

Imitation learning

— / —

Sim to real

— / —

Foundation policy

2.00 / 2.00

Data flywheel

— / —

Transfer fine tune

— / —

Segment length and thickness are the gapNo public evidence yet

Which is better for what

Each row is decided by the axes that matter for that kind of work, read off the same Capability scores as the ranking. Rows only appear where both humanoids have enough public record to answer.

Manufacturing and warehouse work

Named pilots and field hours, backed by what the hands can actually do.

UBTech Walker S

UBTech Walker S scores higher on Deployment and Manipulation — 2.33 against 0.60 for XPeng IRON.

Running without a human in the loop

Unattended operation and task horizon, backed by what the robot can perceive.

UBTech Walker S

UBTech Walker S scores higher on Autonomy and Perception — 1.87 against 0.33 for XPeng IRON.

Working alongside people

Functional safety and certification, plus how it reads and answers people.

UBTech Walker S

UBTech Walker S scores higher on Safety and HRI — 1.47 against 0.33 for XPeng IRON.

Research and developer use

How much of the stack is documented and reproducible.

UBTech Walker S

UBTech Walker S scores higher on Learning and Perception — 0.80 against 0.60 for XPeng IRON.

How solid the record is on each side

UBTech Walker S

Sub-axes on the record: 29 of 40 · 73%
Carried by verified material: 8%
Rests on claims and demos: 1.57

Best documented — Locomotion, Manipulation, Perception, Autonomy, HRI, Deployment

Nothing on the record — every axis has at least one read

XPeng IRON

Sub-axes on the record: 11 of 40 · 28%
Carried by verified material: 2%
Rests on claims and demos: 0.46

Best documented — Perception

Nothing on the record — Autonomy

What this comparison cannot settle

Neither humanoid has a public read on 11 of the 40 sub-axes, so those cannot be compared at all.
18 sub-axes are read on only one side. A one-sided cell is undecided, not a zero for the silent side.
Most of UBTech Walker S's score rests on vendor statements and demo footage rather than independently verified material (8% carried by verified evidence).
Most of XPeng IRON's score rests on vendor statements and demo footage rather than independently verified material (2% carried by verified evidence).
Demonstrations happen in different environments and product revisions are not always equivalent, so like-for-like uptime and throughput figures do not exist for most of the field.

Go deeper on either humanoid

Nearby comparisons

All comparisons →

Cyborg IndexJuly 2026 editionCapability scoremethodology