GPTZero has identified apparent AI-generated hallucinations in four PwC Middle East reports, following earlier investigations by the same firm that led EY and KPMG to retract reports containing similar fabrications. Three of the four largest professional services firms have now had published client-facing work called into question by an outside detection vendor. The pattern matters more than any individual document. These are not internal drafts or marketing pieces. They are deliverables carrying a firm’s name, produced under engagement letters, and in some cases used as inputs to investment and policy decisions.