I was wondering if the Tesla Semi truck had a bed.

As far as we know, the Tesla semi-truck does not come with a bed.  

A semi-truck is a huge, cab-over-engine truck that is commonly used to move cargo.

The Tesla Semi's ability to haul up to 80,000 pounds of freight comes from two battery packs mounted on either side of the cab,  

It has a one-of-a-kind layout and can accommodate up to four people; it also comes equipped with high-tech sensors, radar, and a full-circle video system.  

The vehicle's four motors are all separate but complement each other, allowing for high-level performance.

The Tesla Semi has the same capabilities as a standard semi truck,

but with unprecedented technological advancements and superior performance.