She is literally one-of-a-kind. In 1958, they planned to make
six nuclear-powered carriers and call them the Enterprise class
carriers, but they cost too much so they only made the one named
USS Enterprise. Nimitz class carriers were built later. Although
the Nimitz class carriers are loosely based on the USS Enterprise,
the USS Enterprise is not in the Nimitz class and is quite
different. So, no. The USS Enterprise is not a Nimitz-Class
aircraft carrier.