It isn’t because Fable doesn’t know the answers. It’s because Anthropic won’t let it, by design. Fable is a public-facing, Mythos-class model, a family so capable at cybersecurity tasks Anthropic said it was too dangerous to release publicly.

Anthropic released a 'safe' version of Claude Mythos — and changed its data retention policy for the model, too.

Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardrails that block responses in high-risk areas like cybersecurity and biology.

Microsoft has reportedly restricted the use of Anthropic's first widely available Mythos-class AI model, Claude Fable 5. But the reason behind this may not be what you think.

Cybersecurity researchers are complaining that Anthropic's new model Fable has guardrails that are too strict for any cybersecurity work.

Step into Albion and find out what it means to build an extraordinary life. This extended gameplay demo dives into the heart of Fable’s living population – a systemic, interconnected game-within-a-game.