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Musk Rejects '4D Chess' Theory and Says Optimus Production Will Be Extremely Slow

The CEO’s comment signals a cautious, unpredictable early ramp for the humanoid robot during Tesla’s Fremont line conversion.

Overview

  • Musk said Wednesday that limited Optimus production is set to begin at Fremont in late July or August and that initial output will be extremely slow and hard to predict.
  • He warned the robot’s complexity — roughly 10,000 unique parts — requires new processes and makes early production rates uncertain.
  • Tesla has converted the Fremont line by ending Model S and Model X production to make room for Optimus and is building larger capacity at Giga Texas to hit ambitious multi‑year targets.
  • The company has missed prior Optimus timelines since 2022, and Musk’s rejection of fan theories that Tesla is secretly far ahead underscores a shift toward more cautious public expectations.
  • Experts say scaling humanoid robots will need new automation, actuator supply chains and quality controls, so early units will likely perform simple factory tasks first and industry watchers should look for first production metrics and capability demos for concrete proof of progress.