Anthropic requires 30 day data retention for Fable and Mythos
a day ago
- #enterprise-compliance
- #model-safety
- #data-retention
- Mythos-class models and future models with similar capabilities will retain prompts and outputs for 30 days for safety purposes, effective June 9, 2026.
- This policy applies to organizations using zero data retention (ZDR) settings in Claude Console, Claude Code with ZDR in Claude Enterprise, or through AWS Bedrock, Google Cloud Agent Platform, or Microsoft Foundry with ZDR.
- Retention is needed to detect patterns of misuse, such as jailbreaking or state-sponsored attacks, which require analyzing multiple requests together.
- Anthropic employees can only access conversations flagged for serious harm or upon customer request, with strict logging and security controls in place.
- Data is automatically deleted after 30 days unless part of a safety investigation or legal requirement, with options for customer-managed encryption keys.
- Organizations must enable retention in their workspaces or cloud environments to use covered models, while consumer plans and other surfaces remain unaffected.