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.

Anthropic has launched Claude Fable 5, a Mythos-class AI model that outperforms GPT 5.5 in coding and vision tasks despite strict new safeguards.

June 10 (Reuters) - Microsoft is limiting employees' use of Anthropic's Claude Fable 5 because of the AI startup's new data retention requirements, The Verge reported on Wednesday, citing sources. Anthropic on Tuesday said it is rolling out Claude Fable 5,

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

Several well-known security researchers believe that the cybersecurity barriers of Anthropic's new AI model, Fable 5, are set too strictly. They report that the protective mechani

Anthropic is facing criticism after disclosures revealed that Claude Fable 5 may quietly limit responses related to advanced AI research, without informing users when such restrictions are applied.

Anthropic CEO Dario Amodei demands mandatory AI testing and government blocking powers a day after Claude Fable 5 launch.

Anthropic has changed Claude Fable 5 so users can see when requests on frontier AI development are refused or rerouted. The shift follows criticism over a hidden safeguard that raised concerns about research limits and competition.