Alongside Fable 5.1, Anthropic announced Enterprise Frontier Safeguards (EFS): activity data for monitoring can live in the customer’s own cloud account under their keys, with automated misuse signals sent to the customer’s team and no Anthropic human review by default—ZDR-like privacy plus cross-session detection. EFS rolls out in phases starting this fall across Claude Code, Claude Platform, and major clouds; eligible customers get ZDR on Fable 5/5.1 until it is ready.

Key Takeaways

  • ✓EFS keeps monitoring data in the customer cloud under customer keys—ZDR-like privacy with cross-session misuse detection.
  • ✓Automated flags go to the customer’s security team; Anthropic human review is not required by default.
  • ✓Supports Claude Code/Platform and AWS/Google/Azure; phased rollout this fall, with ZDR interim for eligible customers.
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