Anthropic says Claude Fable 5 uses conservative safety classifiers that trigger a fallback to Claude Opus 4.8 in <5% of sessions, in areas like cybersecurity (Anthropic)

Anthropic : Anthropic says Claude Fable 5 uses conservative safety classifiers that trigger a fallback to Claude Opus 4.8 in — Today we're launching Claude Fable 5: a Mythos-class1 model that we've made safe for general use.