Our take
Sirius is a chihuahua-sized walking robot with an LLM voice and a motion library you can program.
Our take in full, what's good, what's not
Sirius is a chihuahua-sized walking robot with an LLM voice and a motion library you can program. Kickstarter backers received units in 2026 and reported frequent falls, unreliable voice recognition, an incomplete app, and a firmware update that reportedly bricked units. It is waitlist-only. Wait for the second batch and better firmware.
- Lightest dynamic walking dog for consumers
- Programmable; Creator Studio
- Backer reports of falls and bricked units
- ~1-hour battery
- Waitlist only; $1,299
Who it's for
Robotics hobbyists with patience.
Who it's not for
- ~1-hour battery
- Waitlist only; $1,299
Specs
| Price | $1,299 (waitlist) |
| Moves | Walks |
| App / Wi-Fi | Required |
| Battery | ~40–60 min active, 1–2 h idle |
| Weight | ~1 kg |
| Subscription | None |
| Warranty | 1 year |
All specs, in full
- Battery
- ~40–60 min active, 1–2 h idle; ~1 h charge (per user reviews)
- Weight
- ~1 kg (2.2 lb)
- Size
- Chihuahua-sized (dimensions not published)
- Materials / fur
- Hard plastic 'bionic bone' body; no fur
- Sensors
- 8 MP camera, dual microphones, 5 TOPS AI accelerator, 14 axes (legs + head)
- Sounds
- Speaker with LLM voice (OpenAI integration), customizable voice tones
- Movement
- Walks, runs, dances, plays soccer on 4 legs; 1,000+ motion library
- App required
- Yes
- Wifi required
- Yes
- Warranty
- 1 year; lifetime support (official)
- Subscription
- None
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Notable features
- Lightest dynamic walking robot dog for consumers; LLM voice interaction
- Programmable (Python/C/C++), Creator Studio for custom motions
- Shipped to Kickstarter backers in 2026
Limitations reported by owners and reviewers
- Backer reviews: frequent falls, unreliable voice recognition, app incomplete, a firmware update (2.4.8) reportedly bricked units, slow support
- Very short battery (~1 h)
- Not child-friendly without supervision; expensive; waitlist-only
Evidence and real-world use
We found no peer-reviewed studies or documented care-program deployments for this product as of September 5, 2026. That is normal for consumer robots; it just means claims about wellbeing benefits are the manufacturer's, not independent.
How we know this, and sources
Specs and prices come from the manufacturer's own pages and press releases, checked on September 5, 2026; owner-reported limitations come from published reviews and caregiver forums. We have not yet tested this unit hands-on — what that means. Price confidence: medium. Confirm on the manufacturer's site before buying.
Price note: $1,299 retail cited on hengbot.com (AP quote) and media; Kickstarter (Jul–Aug 2025, $912,768 from 1,150 backers) super-early-bird $859. Official site shows 'Join our waitlist' — no open cart as of Sept 5, 2026.
- hengbot.com/
- hengbot.com/pages/hengbot-sirius-ai-dog-robot
- mia-cat.com/en/pet-robot/hengbot-sirius-review/
Image: Photo: Hengbot press release — source.
