Anthropic releases Claude Fable 5, a 'Mythos-class' AI model with safeguards

Anthropic released Claude Fable 5, a 'Mythos-class' AI model with safeguards restricting cybersecurity, biology, chemistry, and distillation queries to its Opus 4.8 model. The model exceeds previous Anthropic models in capabilities but is limited in access, with a 'trusted access program' planned for a version without full safeguards.