"In some cases, we need to retain Personal Data for longer even after you delete it, for example because we are legally required to, to address fraud and abuse, for security reasons, or for financial record-keeping purposes. If specific Content, or your account, is banned because of violations of our usage policies, we may retain that data for to protect our services from fraud, abuse, or other violations of our policies."
Even after users delete their data, OpenAI retains personal data indefinitely for broad reasons including security, fraud prevention, and policy violations, with no specified maximum retention period.