Claude Mythos 5 仅向合作伙伴发布——‘安全’的 Claude Fable 5 是否只是降级？
anthropic 向合作夥伴發布了 claude mythos 5，向公眾發布了 claude fable 5，但公開版會將危險查詢重定向至舊型號，從而限制其能力以防止網絡攻擊。
anthropic launched claude mythos 5, offering the full model to industry partners and government collaborators under project glasswing while restricting the public claude fable 5. fable 5 automatically reroutes prompts involving cybersecurity, biology, chemistry, or model distillation to the older claude opus 4.8 to prevent exploitation. anthropic stated this cautious approach was necessary to safely release the model broadly, noting competitors will inevitably match mythos-level capabilities soon.