Anthropic’s new AI model is powerful, dazzling—and about to get really expensive

Fable is available to subscribers for now. But its upcoming shift to API-only access shows how quickly frontier AI is moving from ‘all you can use’ to ‘all you can afford.’ Anthropic’s eye-poppingly powerful new model, Fable, is worth testing while you still can. Built by the company behind the Claude chatbot, Fable is the publicly safe version of Mythos, the model Anthropic deemed too dangerous to release just two months ago. To make it available to the average user, Anthropic has introduced stringent guardrails designed to prevent the cutting-edge model from being used for high-risk applications.