By default, many AI providers retain requests briefly for abuse monitoring or model improvement, which is a reasonable default but not always acceptable for regulated or highly sensitive data. A zero data retention agreement or setting turns that off for a specific account, so a request is processed and then discarded rather than logged or used for any other purpose.
The limit is that zero data retention is usually an enterprise contract term or a specific API configuration, not the default behavior of every AI product a company might already be using. Confirming it requires reading the actual data processing terms for each tool, alongside where the provider stores data and under what data residency rules, rather than assuming every AI vendor handles data the same way.