Alice

ALICE 4, developed by South Korean company AeiROBOT (also referred to as AEI Robot), represents a next-generation bipedal humanoid robot platform optimized for human-robot collaboration in diverse real-world environments. Standing at 160 cm tall and weighing approximately 45 kg, it features 41 degrees of freedom (DoF): 6 DoF per leg (12 total), 1 DoF waist, 7 DoF per arm (14 total), 2 DoF head, and 6 DoF per hand (12 total). The core innovation lies in its proprietary gearless linear actuators, which eliminate traditional reducers for superior precision, back-drivability, low inertia, and quiet operation. These actuators enable real-time Field-Oriented Control (FOC) via dedicated motor drivers, supporting multiple modes including position, velocity, torque, and impedance control with high bandwidth. This allows for natural force-based interactions, impedance compliance for safe human contact, and efficient energy use through parallel actuator configurations and integrated heatsink frames for advanced thermal management, minimizing heat buildup during prolonged operation. Architecturally, ALICE 4 separates computing responsibilities: an Intel Core i7-1370PE (6P+8E cores, 20 threads, 1.90 GHz base, 28W TDP) handles real-time control, while an NVIDIA Jetson Orin NX (via GENE-RAP6 module) powers perception and AI inference. Sensors include stereo depth cameras for 3D vision, 6-axis IMUs for balance, Force Sensing Resistors (FSR) and custom foot contact sensors for ground reaction feedback, enabling robust bipedal locomotion over stairs, uneven terrain, and narrow spaces. Hands offer dexterous 6 DoF manipulation for tasks from delicate assembly to complex pick-and-place. AI integration emphasizes embedded processing for low-latency stability, using low-power design, hardware optimization, and data compression to run vision pipelines, object detection, and decision-making onboard, with optional cloud connectivity. Demonstrations showcase NVIDIA Isaac GR00T foundation models for humanoid reasoning and Cosmos for simulation-to-real transfer, alongside natural language processing (NLP), gesture generation, and VR teleoperation for imitation learning. Operating on a ROS2-based Linux OS (inferred from prototypes), it achieves 250-450 ms end-to-end latency in AI-assisted actions. Real-world deployment history marks ALICE as Korea's first humanoid approved for shipbuilding and construction sites (October 2025), highlighting industrial viability. It has featured in high-profile events: MWC 2025 with LG U+'s 'ixi' AI for voice interaction, GTC 2025 earning innovation awards, Next Rise 2025 fair, GALAXY ROBOT NIGHT with G-DRAGON showcasing teleoperation bartending, and NVIDIA demos with GR00T/Cosmos. Additional pilots include manufacturing demos with officials like President Lee Jae-myung, underscoring safe collaboration. Priced around $50,000-$100,000 (estimates), ALICE targets research labs, service robotics, and early commercial automation, evolving from prototypes (31 DoF, 157 cm) to this production-ready platform.