Claude Mythos 5 is available for the NSA and selected partners. The released, restricted version is called Claude Fable 5. There are no subscriptions.

Anthropic said the new version, called Claude Fable 5, will have safeguards to prevent misuse in fields like cybersecurity.

Anthropic launched Claude Fable 5 on Tuesday, a Mythos-class model with safeguards blocking cybersecurity and biology queries, priced at $10 per million input tokens.