Claude Fable 5 is designed to tackle complex projects over days or weeks with minimal human oversight, while its unrestricted sibling remains limited to security and critical infrastructure partners

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.