Anthropic to launch Claude Fable today, a security-hardened version of the Mythos model

According to The Information, sources say Anthropic may release its new model Claude Fable today. Described as a secure version of Mythos, Claude Fable retains some advanced capabilities while adding safety restrictions for high-risk scenarios such as cyberattacks. Anthropic previewed Mythos in April this year, stating that it can discover numerous previously unknown cybersecurity vulnerabilities—but did not directly release it due to potential safety risks. As of now, Anthropic has not officially announced detailed information about Claude Fable.