Fourier GR-2 vs UBTech Walker S
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-axesUBTech Walker S scores 1.13 higher than Fourier GR-2, 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. Fourier GR-2 has more unscored ground than the gap between them, so this could change next month.
Not ahead by enough on any axis to be worth reporting.
- HRI+2.40Rests on claims and demos
- Deployment+1.80Rests on claims and demos
- Autonomy+1.60Rests on claims and demos
- Manipulation+1.00Rests on claims and demos
16 sub-axes on the trailing side have no public evidence yet. If all of them scored full marks they would be worth 2.00 — against a gap of 1.13.
- HRI · Social presentationup to +0.125
- Manipulation · Bimanualup to +0.125
- Locomotion · Uneven terrainup to +0.125
- Locomotion · Stairsup to +0.125
- Learning · Foundation policyup to +0.125
We have public evidence for 54% of the 40 sub-axes across these two.
14/40 sub-axes have evidence
Faint outline = UBTech Walker S
29/40 sub-axes have evidence
Faint outline = Fourier GR-2
- 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.
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.
- Sub-axes on the record
- 14 of 40 · 35%
- Carried by verified material
- 10%
- Rests on claims and demos
- 0.51
- Sub-axes on the record
- 29 of 40 · 73%
- Carried by verified material
- 8%
- Rests on claims and demos
- 1.57
What this comparison cannot settle
- Neither humanoid has a public read on 10 of the 40 sub-axes, so those cannot be compared at all.
- 17 sub-axes are read on only one side. A one-sided cell is undecided, not a zero for the silent side.
- Most of Fourier GR-2's score rests on vendor statements and demo footage rather than independently verified material (10% carried by verified evidence).
- Most of UBTech Walker S's score rests on vendor statements and demo footage rather than independently verified material (8% 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.