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Rizon 4s
Flexiv
Not yet assessed
- Height
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- Payload
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- Verified autonomy
- not assessed
- Real deployment
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Rizon 4s
FlexivThe Flexiv Rizon 4s is a 7-axis, force-controlled adaptive robotic arm manufactured by Flexiv (headquartered in Santa Clara, CA with China offices). It features a 4 kg payload, 919 mm reach, ±0.05 mm repeatability, 0.05 N force sensing resolution, 10-micron assembly accuracy, IP65 protection, and an integrated 6DoF force/torque flange sensor that distinguishes it from the base Rizon 4. The arm is designed for industrial tasks including assembly, dispensing, material handling, and surface inspection, leveraging AI-driven force control and hand-eye coordination to handle unstructured environments. Evidence for real-world autonomous task execution exists (e.g., EsVata sanding deployment), though independent technical reviews are sparse and most capability claims originate from vendor or commerce sources.
Availability
Specification
- degrees_of_freedom
- 7 axes
- payload
- 4 kg (Automate.org/RoboDK); 3.5 kg listed by one reseller (Cardinal Machine)
- reach
- 919 mm (Automate.org); 780 mm nominal / 990 mm max reach per Cardinal Machine reseller
- robot_weight
- 21 kg
Price
No public price — contact the supplier for a quote.
Good · Bad · Ugly
Evidence-graded claims from the Flexiv deep report
Independent research validates 86% average success rate on contact-rich manipulation tasks using Flexiv hardware (PhaForce, +40 percentage points over baselines).
Peer-reviewed/preprint paper PhaForce [21] independently reports 86% average success on contact-rich tasks using Flexiv arms, with a +40 pp improvement over baselines; however, these are controlled lab conditions and may not reflect production-line performance.
from Flexiv deep report →Flexiv has raised over $100M in Series B+ funding (2022) and secured an additional undisclosed strategic investment led by Invus in March 2026.
The $100M Series B+ is confirmed by independent trade press [8][20] and the Invus round is corroborated by multiple independent news outlets [11][12][13][14], though the undisclosed amount and deployment-scale outcomes remain unverified.
from Flexiv deep report →
Flexiv's Enlight arm features whole-body touch sensitivity via multi-dimensional force-torque sensors in each joint, with 4 axes capable of 720-degree rotation and a 15 kg body weight.
All Enlight specifications originate solely from Flexiv's own Automate 2026 press announcement [4]; no independent benchmark, teardown, or third-party test has verified these specs or the claimed tactile sensing performance.
from Flexiv deep report →Real-world AGV/robot deployments in warehouse environments require approximately 1 hour of engineer recovery time per fault on the day shift, indicating meaningful operational overhead beyond vendor demos.
A Reddit community first-hand report [31] describes ~1-hour recovery times in mixed warehouse AGV deployments, but the report does not specifically name Flexiv equipment, so attribution to Flexiv's products specifically is unconfirmed.
from Flexiv deep report →
About the company
Editorial directory of real robot products from leading global manufacturers. Each entry links to the manufacturer's official page.
