Anthropic terms of service:

> 12. General terms

> Changes to the Services. Our Services are novel and will change. We may sometimes add or remove features, increase or decrease capacity limits, offer new Services, or stop offering certain Services.

> Unless we specifically agree otherwise in a separate agreement with you, we reserve the right to modify, suspend, or discontinue the Services or your access to the Services, in whole or in part, at any time without notice to you. Although we will strive to provide you with reasonable advance notice if we stop offering a Service, there may be urgent situations—such as preventing abuse, responding to legal requirements, or addressing security and operability issues—where providing advance notice is not feasible. We will not be liable for any change to or any suspension or discontinuation of the Services or your access to them.

You're not buying a gallon of milk or a pound of flour. You're buying hosted software that the host reserves the right to modify.