Anthropic announced that it will require 30 days of data retention when using Fable 5, Mythos 5, and future models with equivalent or superior capabilities on AWS Bedrock.
Anthropic to Require 30-Day Data Retention for Mythos-Class Models on AWS Bedrock
This article is a translation. Read the Japanese original
Data retention is conducted to detect patterns of misuse that may not be apparent from single interactions.
If a user opts in to data retention, the data will move outside of the AWS data and security boundary.
Retained data will be automatically deleted after 30 days, except in rare cases involving safety investigations or legal requests.
--- Source: AWS Bedrock to require sharing data with Anthropic for Mythos and future models (HN 427pt, 255 comments) (HN Search (backfill), 2026-06-10)