Answer:
n o, it isn't.
even tho your claim might be able to fit into a sentence, never confuse it for being the same as a sentence.
while a claim is the main argument of an essay,
a sentence is a set of words that usually contain a subject+predicate, and end with either a question mark, period, or exlclamation point.
~hope i helped ouo have a nice rest of ur day~
lots of love,
lee