Safety filters and refusal behavior determine whether an AI assistant can be reliably deployed in professional, regulated, or brand-sensitive environments without introducing operational or reputational risk. In this comparison, Grok 4.1  and Claude Sonnet 4.5  embody two fundamentally different approaches to safety enforcement, one centered on permissive exploration with late intervention , the other on preventive restriction with early refusal . ····· Safety filters shape w

Hallucination control is one of the most critical dimensions of AI reliability in professional contexts, because errors rarely appear as obvious falsehoods and instead surface as plausible, well-structured, but incorrect assertions  that can silently propagate into documents, decisions, or external communications. In this comparison, Claude Sonnet 4.5  and ChatGPT 5.2  represent two distinct philosophies of factual reliability, one centered on preventive restraint , the other