Claude Fable 5.1 and Mythos 5.1 share identical model weights, a quoted passage says
A user shared a description saying Fable 5.1 was released for general access with added safeguards that block tasks in high-risk, dual-use knowledge domains.
TLDR
A passage shared by a user on September 1 describes Claude Fable 5.1 and Claude Mythos 5.1 as two configurations of a new Anthropic large language model, sharing identical model weights. It says Fable 5.1 was released for general access with additional safeguards that block tasks in high-risk, dual-use knowledge domains.
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