
Using Anthropic's Claude Fable 5 or Mythos 5 on Amazon Bedrock requires opting into provider_data_share, sending prompts and outputs to Anthropic for 30-day retention with human review. Previous Bedrock models kept inference data inside AWS. Anthropic frames the retention as a safety requirement for catching novel attacks.
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Summary by ByteBrief
How Powerful is Claude Fable (Mythos) 5 for Coding?