Tesla was not immediately available for additional comment. But the automaker has long planned to add both a semi truck and a pickup truck to its lineup of cars. Musk discussed both in the second volume of his "master plan" for Tesla.
"We believe the Tesla Semi will deliver a substantial reduction in the cost of cargo transport, while increasing safety and making it really fun to operate," Musk wrote in his plan.
Responding to questions on Twitter Thursday, the CEO also offered details on two more of the company's future models.
He said Tesla's next generation Roadster will be a convertible.
Elon Musk says Tesla will reveal a semi truck in September
"We believe the Tesla Semi will deliver a substantial reduction in the cost of cargo transport, while increasing safety and making it really fun to operate," Musk wrote in his plan.
Responding to questions on Twitter Thursday, the CEO also offered details on two more of the company's future models.
He said Tesla's next generation Roadster will be a convertible.
Elon Musk says Tesla will reveal a semi truck in September