S1

Overview

Astribot S1 is a full-size humanoid robot on an omnidirectional wheeled base, developed by Astribot, a subsidiary of Stardust Intelligence. It has 23 degrees of freedom, cable-driven arms reaching 10 m/s, and a 5 kg per arm payload. The S1 debuted at the 2024 World Robot Conference in Beijing and is designed for fully autonomous task execution via whole-body imitation learning.

The S1 stands approximately 170 cm tall and weighs approximately 80 kg, per Interesting Engineering's May 2026 report on Astribot's T1 launch, which gave the first complete S1 spec breakdown. It has 23 degrees of freedom: 7 per arm, 4 in the torso, 2 in the head, and 3 in the omnidirectional wheeled base. Each arm has a cable-driven architecture designed to mimic human musculature, providing compliant motion and a payload capacity of 5 kg per arm at full horizontal reach. Top arm speed is 10 m/s with ±0.1 mm positioning repeatability, per Astribot's own launch materials reported by IoT World Today in May 2024. The sensor suite includes RGB-D cameras, LiDAR, IMUs, and force and tactile sensors.

The S1's AI framework — Astribot Suite, documented in a paper published on arXiv in July 2025 (arXiv:2507.17141) by Stardust Intelligence researchers — uses a whole-body imitation learning system called DuoCore-WB. Data collection uses VR headset and handheld joysticks to map human hand poses to the robot's end-effectors in first-person or third-person view. The learning policy uses RGB-based visual perception and a Real-Time Trajectory Generation module that converts predicted actions into continuous motion via quadratic programming. The paper reports an average 80% success rate and a peak 100% success rate across six benchmark whole-body tasks.

Astribot is a subsidiary of Stardust Intelligence, founded in late 2022 in Shenzhen by Lai Jie, formerly of Tencent Robotics Laboratory and Baidu. The S1 debuted at the World Robot Conference in Beijing in August 2024. Commercial availability in China began in late 2025. No verified public pricing has been confirmed by Astribot directly.

Specifications

Sensors

Software