Please don't anthropomorphize LLMs even further by assigning them gendered pronouns. LLMs are always "it"s. They're not alive, they're just really complicated linear algebra expressions. Prematurely anthropomorphizing them, even subtly like this, will come back to bite us if we keep doing it.
Why not? Claude is a male name, and the model behaves close enough to a human that I think it's fine to refer to it as a he or a she. Also note that some languages don't have neutral pronouns and it's perfectly fine to say a mosquito is a "he", and a spider a "she" for instance. Are they more humans than a LLM?
