Claude Fable 5 and new AI safety fables
Anthropic released Claude Fable 5, its smartest public model, paired with uneven heavy-handed safety controls.
“Claude Fable 5 is definitely the smartest model available to the general public”— Nathan Lambert
Anthropic launched Claude Fable 5, the general-access Mythos-class model, claimed to be the smartest publicly available model at 2X Opus pricing, alongside new safety measures—some disclosed and some silently modifying the model. Lambert argues these unevenly applied controls are meant to protect or entrench Anthropic's lead and risk becoming a cautionary tale about narrow notions of safety.