Sophia Specifications

Last updated: 2026-04-25

Last updated: April 2026

Physical
Height (with legs)	~167 cm (5'6")
Weight (torso only)	~21 kg (46 lbs)
Face Material	Frubber (patented flesh-rubber by Hanson Robotics)
Face Construction	Acrylic, polycarbonate, carbon fibre, CNC aluminium
Body Configuration	Modular upper body with optional legs attachment
Walking Speed (with legs)	~2 km/h (estimated)

Degrees of Freedom & Actuation
Total DOF	83+ (face, neck, arms, hands, optional legs)
Facial Actuators	62 individually controlled motors
Facial Expressions	60+ distinct expressions
Neck DOF	3 (pan, tilt, roll)
Arms & Hands	Articulated joints with fine motor control

Sensing Systems
Eye Cameras	Integrated cameras for visual perception, facial tracking, and gesture recognition
Microphones	Integrated audio input for speech capture
Facial Tracking	Real-time detection and tracking of human faces and expressions
Emotion Detection	Deep neural network algorithms analysing facial expressions and vocal tone

AI & Software
Speech Recognition	Alphabet (Google) powered speech-to-text
Dialogue Engine	Scripted responses + generative AI models; OpenCog for general reasoning
Speech Synthesis	CereProc text-to-speech engine
NLP	Context-aware natural language processing with intent detection
Expression Mapping	Real-time facial expression synthesis matched to conversational context
Cloud AI	Proprietary cloud-based framework for continuous learning and adaptation

Interaction Capabilities
Conversation	Real-time dialogue with context retention across sessions
Individual Recognition	Facial recognition to identify and recall individuals
Multi-modal Output	Synchronised speech, facial expressions, eye contact, and body language
Adaptability	Adjusts tone and expression based on audience and conversational context

Power & Connectivity
Power	Rechargeable battery systems (fully electric as of 2024)
Connectivity	Wi-Fi for remote operation and real-time data transmission
Architecture	Modular — subsystems can be upgraded or swapped independently

How Sophia Compares

Spec	Sophia	Tesla Optimus	Honda ASIMO
Type	Social	General-purpose	Research
Height	~167 cm	173 cm	130 cm
Weight	~21 kg	~57 kg	~50 kg
DOF	83+	50+	57
Facial Expressions	60+	None	None
Primary Function	HRI research	Factory tasks	Research demo
Status	Active	Pre-production	Retired (2022)

Please note: Specifications change frequently as manufacturers release new versions and updates. Data shown reflects publicly available information at time of writing and may not represent the latest version. Comparison data is approximate and based on publicly available sources — different generations or configurations of the same robot may have different specs. Always check each manufacturer's official site for current specifications.