How Tesla's Optimus Actually Works (3D Teardown)

Tesla started building Optimus on a real production line. So how does a humanoid robot actually work? We take it apart, piece by piece, and put every part next to the part of you it copies. What's inside: • Why Optimus's most quoted specs (73 kg, 100 W, 500 W) are actually yours • A battery that holds about one day of your food • 28 actuators, the strain wave gear and the roller screw that lifted a half-tonne piano • Why the hand is the hardest part: no muscles in your fingers, and 26 motors in one Tesla forearm • The Optimus Academy, and how close it is to your life The 3D in this video is our own model, based on Tesla's public images and patents; the inside layout is an illustration where Tesla hasn't shown it. Real footage is Tesla's and the other companies' own, credited on screen. CHAPTERS 0:00 Tesla Optimus, taken apart 0:45 1. The body: designed from you 1:29 The battery: a day's food for a day's work 2:18 2. The muscles: 28 actuators 2:50 Inside an actuator: the strain wave gear 3:21 The roller screw (and the piano) 3:46 3. The hand: why it's the hardest part 4:39 The forearm is the hand: Tesla's patents 5:43 Why it's still not finished 6:13 The race for the hand 6:31 4. The mind: an Optimus Academy 7:05 5. How close is it to you? 7:52 Watch next SOURCES (the main ones; every number on screen is in our fact-check log) Tesla Q3 2026 Update (SEC 8-K, Oct 21 2026): https://www.sec.gov/Archives/edgar/da... Tesla Q3 2026 earnings call (transcript): https://www.fool.com/earnings/call-tr... Tesla AI Day 2022 (actuators, battery, "Human Form" slide):    • Tesla AI Day 2022   Tesla hand + forearm patents (published Apr 16 2026): https://patents.google.com/patent/WO2... · https://patents.google.com/patent/WO2... · https://patents.google.com/patent/WO2... · https://patents.google.com/patent/WO2... Elon Musk on the hand (Lex Fridman Podcast, episode 438): https://lexfridman.com/elon-musk-and-... Hands, sensors, production problems (Electrek, Oct 2026): https://electrek.co/2026/10/22/tesla-... Hand anatomy and skin: OpenStax Anatomy & Physiology 2e (CC BY 4.0): https://openstax.org/books/anatomy-an... · https://openstax.org/books/anatomy-an... Touch fibres: Corniani & Saal, J Neurophysiol 2020, doi:10.1152/jn.00313.2020; Johansson & Vallbo, J Physiol 1979 Boston Dynamics Atlas hand: https://www.therobotreport.com/boston... · Unitree Dex5: https://www.unitree.com/Dex5-1 · 1X NEO: https://www.1x.tech/neo · Figure 03: https://www.figure.ai/news/introducin... Our math, shown on screen: 2.3 kWh × 860 kcal/kWh ≈ 1,978 kcal; a ~500 kg piano ÷ a 2.2 kg actuator ≈ 227×. FOOTAGE & IMAGES Footage: Tesla (AI Day 2022, Optimus Gen 2, Tesla Bot updates, Tesla_Optimus on X), Boston Dynamics, Unitree Robotics, 1X Technologies, Figure AI, XPENG; used for commentary and explanation. Anatomy: Gray's Anatomy (1918, public domain). 3D human references: Human Base Meshes by Blender Studio (CC0). Music: original score. Futuranatomy: tomorrow's tech, taken apart. Every future has an anatomy. #TeslaOptimus #HumanoidRobot #Futuranatomy