Astribot S1 Humanoid Robot: Rapid and Accurate Robotics Driven by Imitation Learning

The Astribot S1 humanoid robot is a full-size, dual-arm manipulation platform that learns tasks by watching people do them. If you run a research lab, a university robotics program, or a corporate innovation team and you are weighing a humanoid purchase, the question is not whether the S1 looks impressive on video. It is whether its speed, precision, and imitation-learning workflow match the work your team plans to do with it.

This article walks through what the S1 actually is, how fast and how precise its arms are, how imitation learning works on it, and where it fits next to the legged humanoids RoboticsSelect also carries.

What is the Astribot S1?

Astribot is a Shenzhen-based humanoid robotics company founded in late 2022 and launched from the Stardust Intelligence team. It came to global attention in 2024 when demonstration videos of the S1 performing kitchen and household tasks at human-like speed went viral. The S1 is the platform behind those videos: a full-size humanoid that stands about 1.7 m tall, with two arms, a 4-DoF articulated torso, and a 3-DoF omnidirectional wheeled base instead of legs.

The wheeled base is the design decision that defines the machine. Most humanoid companies lead with legs; Astribot led with hands. Balancing a biped consumes a large share of a robot's energy and compute budget. By rolling instead of walking, the S1 spends that budget on its arms and its onboard AI. The base moves at a typical speed of about 1.5 km/h on flat indoor surfaces and does not handle stairs or uneven terrain.

RoboticsSelect carries the Astribot S1 as an authorized dealer, alongside the legged platforms in our humanoid robot collection. Every unit ships through the manufacturer's official channel with the full manufacturer warranty.

How fast and how precise are the arms?

Each of the S1's two arms has 7 degrees of freedom (DoF), meaning seven independent joints, which is the same count as a human arm from shoulder to wrist. That redundancy lets the arm reach around an object from more than one angle rather than only approaching it head-on. The arms reach peak end-effector speeds of up to 10 m/s, which Astribot describes as among the fastest demonstrated publicly on a humanoid manipulator.

Speed alone is not useful for handling objects, so the second half of the specification matters more. Positioning repeatability is plus or minus 0.1 mm, and force control resolves to about 0.1 N. In plain terms, the arm returns to the same point within a tenth of a millimeter, and it can modulate how hard it pushes or grips in steps of roughly ten grams of force. Those are the numbers that make tasks like pouring liquids, folding cloth, and light assembly tractable.

The actuation is cable-driven, which Astribot uses for a high payload-to-weight ratio, low backlash, and compliant motion that is safer to be near. Each arm carries up to 5 kg at full reach, and both arms can cooperate on larger objects. The 4-DoF torso extends the working envelope from the floor to high shelves. The standard end effectors are parallel-jaw grippers.

Astribot S1 manipulation specifications

Specification	Astribot S1
Height	About 1.7 m
Arms	Two arms, 7 DoF each
Peak end-effector speed	Up to 10 m/s
Repeatability	Plus or minus 0.1 mm
Force control	About 0.1 N resolution
Payload	Up to 5 kg per arm at full reach
Base	3-DoF omnidirectional wheeled base, about 1.5 km/h
Runtime	4 to 6 hours per charge depending on task intensity

How does imitation learning work on the S1?

Traditional industrial robots are programmed step by step, and the program breaks the moment an object is not where the code expects it. The S1 takes a different route. It is AI-native and acquires tasks through imitation learning from human demonstrations: an operator performs the task through the VR teleoperation system, the robot records the trajectories, and an imitation policy is trained on those demonstrations. The number of demonstrations needed depends on the task.

Two things support that workflow out of the box. First, the S1 ships with a library of manipulation primitives such as grasping, pouring, and stacking that can be composed without training a new policy. Second, a zero-code visual programming toolchain lets a team chain behaviors without writing code, while an SDK and API with development guides cover the full path from data collection through model training to deployment testing. Support for mainstream simulation platforms is included, so a lab can start building in simulation before the hardware arrives.

Perception comes from multiple RGB cameras and force sensors for multimodal sensing. Astribot does not publish a detailed sensor list or a compute figure for the onboard AI hardware, so if your project depends on a particular camera placement, depth sensing, or a specific processor, contact us through the contact page before you order and we will confirm the current configuration.

What has the S1 actually demonstrated?

Astribot has publicly demonstrated the S1 performing pouring, food preparation, laundry folding, cleaning, and calligraphy. Those tasks share a common thread: they need force modulation and two coordinated hands more than they need mobility, which is exactly what the platform is built for. Bimanual coordination control lets the two arms work on one object at once, such as holding a container while pouring into it.

The honest framing for buyers is that these are bounded, supervised tasks. Astribot positions the S1 for research labs, controlled industrial environments such as assembly and packaging cells, and supervised service and hospitality demonstrations. It is not certified for unsupervised public deployment or for use around children, and it needs flat indoor floors and reliable Wi-Fi for its supervisory link. If your program is about what robots can do with their hands in those settings, the S1 is the strongest platform we carry for it.

S1 or a legged humanoid: which fits your program?

Humanoid research splits into two broad programs, and the brands in our humanoid collection each concentrate on one. LimX Dynamics builds legged locomotion platforms: the Oli EDU is a full-size biped for studying whole-body motion and balance, and the TRON1 is its compact multi-modal sibling. Astribot concentrates on manipulation. The first buying question is therefore honest scoping: is your work about how robots move, or about what they do with their hands?

Spec	Astribot S1	LimX Oli EDU
Research focus	Bimanual manipulation	Bipedal locomotion and whole-body control
Height	About 1.7 m	165 cm
Base	Wheeled omnidirectional	Legs, 6 DoF each
Arm payload	5 kg per arm at full reach	3 kg per arm with the standard gripper
Runtime	4 to 6 hours	About 2 hours per charge
Hardware warranty	24 months (battery 12 months)	12 months (battery 6 months)

Locomotion work needs legs, fall management, and sim-to-real training pipelines. Manipulation work needs force-controlled arms, hand-eye cameras, and demonstration-learning tooling. Buying the wrong direction is an expensive way to find out, which is why our humanoid robot buying guide starts with that decision before any spec sheet.

What should a lab prepare before the S1 arrives?

An S1 purchase is a capital acquisition, and the platforms in our $10,000 and up research tier are build-to-order machines. Plan for the lead time in grant and semester schedules; RoboticsSelect confirms the shipping estimate at the time of order and prepares itemized quotes for procurement and institutional purchase orders.

On site, the requirements are simpler than for a biped because there is no gait to manage and no fall-arrest gantry to build. Astribot's published sequence is to inspect the arms, torso, and base for shipping damage, position the robot on a flat indoor floor with room for both arms to move, power on and let it complete its checks, join it to your network and the supervisory control interface, then install the SDK and, if desired, the VR teleoperation and simulation tools. The onboard battery gives 4 to 6 hours of operation, and the robot can also run plugged in to AC power for benchtop development.

The takeaway

The Astribot S1 trades legs for a stable wheeled base and puts the savings into two fast, precise, force-controlled arms and an imitation-learning toolchain. For manipulation and embodied-AI research, that is the right trade. If your program needs a walking platform instead, the LimX models sit next to it in our humanoid robot collection, and our team can quote either one for institutional purchase.