## A new data retention policy
Finally, we’re making a change to the way we handle business
customer data for Fable 5, Mythos 5, and future models with
similar or higher capability levels. We will require 30-day
retention for all traffic on Mythos-class models, on both
first- and third-party surfaces. [...]
Bedrock doesn't offer zero data retention for OpenAI's latest models either
> For OpenAI GPT-5.4 and GPT-5.5, classifier-flagged traffic will be retained for up to 30 days for automated offline abuse detection
https://docs.aws.amazon.com/bedrock/latest/userguide/abuse-d...
I think that’s by AWS though. For Fable you need to flip an account wide flag that says “I want to share my prompts with the model vendor.”
The Fable announcement page on the Anthropic site says this data sharing will be applied regardless of the sharing setting of the company account.
https://www.anthropic.com/news/claude-fable-5-mythos-5#a-new...
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