Asimov 1 vs HCI3-M1 Tsukumo Shion
Menlo Research vs Mechanical Girl — specs, price, and data-backed comparison.
QUICK TAKE
- HCI3-M1 Tsukumo Shion offers the lighter build (20 kg vs 35 kg).
SPECIFICATIONS COMPARED
| Asimov 1 | HCI3-M1 Tsukumo Shion | |
|---|---|---|
| Company | Menlo Research | Mechanical Girl |
| Category | Humanoid | Humanoid |
| Price: | $20,000 | Not announced |
| Released: | 2026 | — |
| Weight | 35 kg | 20 kg |
| Degrees of Freedom | 27 | — |
| Software / AI | Open platform; run your own AI models and agents on the hardware. Digital Asimov browser-based simulator (free, no hardware or setup). Documentation at docs.menlo.ai/asimov. | — |
Buying guides and prices
FREQUENTLY ASKED QUESTIONS
What is the difference between the Asimov 1 and the HCI3-M1 Tsukumo Shion?
Asimov 1 is made by Menlo Research, while HCI3-M1 Tsukumo Shion is made by Mechanical Girl. Both are humanoids, so the differences come down to price and specifications.
Which is cheaper, the Asimov 1 or the HCI3-M1 Tsukumo Shion?
The Asimov 1 is listed at $20,000; pricing for the HCI3-M1 Tsukumo Shion has not been publicly announced.