Using Claude Fable 5 means your data will be collected. It’s not optional.

Anthropic just released its most powerful public model yet — Claude Fable 5. However, along with the model's release, the AI giant also made a significant update to its data retention policies.Fable 5 was released to the public on Tuesday. Fable 5 is a "safe for general use" version of Anthropic's most powerful model, Mythos, which has been restricted from public use due to its potentially dangerous cybersecurity capabilities. Anthropic created a set of safety guardrails for Fabl