Actually I don't think it is.
There seem to be a lot of confusion about the purpose of a claim in all these discussions and I think it boils down to people thinking or assuming that any statement is by default also a claim, which it is not, at least not in a logical sense.
For instance, as
@Trailblazer in her example, I could similarly make the statement.
"I believe UFOs are real" that is not a claim, that is merely a belief. Even in your example I don't think I would call it a claim or at least a logical claim . Because it is not really an argument or a testable statement in regards to whether that is true or false. Sort of like me saying that "Strawberry tastes better than chocolate", obviously some might agree while others won't, but as with your claim about being best looking bloke, it is not testable or verifiable in regards to whether that could be considered true or false.
And at least in my opinion, referring to a claim outside an argument makes little sense due to this issue.
So when Trailblazer say that she believes Baha'u'llah were who he said, it is not a claim, but a belief. But asked how she reached such conclusion and state the 3 main reasons for this in the OP. Those could be considered an argument for her position, which could be validated in regards to whether or not that is a sound argument or not.
Likewise, you could ask me how I reached the conclusion that UFOs are real and I could say that I saw strange lights in the sky or whatever and we could argue about whether that were the case or whether it were more likely to have been a plane or something else. However me stating that I saw lights in the sky would be a claim, but one that we couldn't really reach a conclusion on, because I obviously wouldn't be able to demonstrate it, however whether or not UFOs exists or not, is a true or false statement, which there is no logical reason for why one couldn't test or reach a conclusion about.
So again, it doesn't fall in the same category as my statement about strawberry and chocolate.
At least in my opinion, to even start talking about whether or not something is a claim or not, it has to be part of an argument to make sense.