According to the San Jose Mercury News, the number ranges anywhere from 400 to 700. A company spokesman said: “As with any company, especially one of over 33,000 employees, performance reviews also occasionally result in employee departures. Tesla is continuing to grow and hire new employees around the world.”
Of course, if that 700 number would ever be confirmed by Tesla, then they just fired 7% of their 10,000 strong workforce in Fremont, and that is not the kind of publicity you want.
Secondly, production misses.