As of August 2018 that appears to not be the case:
Tesla says that the Model 3’s gross margin “should grow significantly” to approximately 15 percent in the third quarter and 20 percent in fourth quarter, thanks to “continued reduction in manufacturing costs and to some extent an improving mix.” From here on out, CEO Elon said during a call with analysts Wednesday evening, “the goal is to be profitable and cash flow positive every quarter going forward.”