Data retention practices for Mythos-class models
Summary
Anthropic's support article states that Mythos-class models require 30-day data retention for prompts and outputs to support trust and safety investigations. The policy applies to organizations with zero data retention (ZDR) configurations or access via certain cloud platforms, while consumer plans remain unaffected. Retained data helps detect misuse patterns, with automatic deletion after 30 days and strict access controls, including optional customer-managed encryption keys and audit logs.