Anthropic admits invisible guardrails were the wrong tradeoff
anthropic apologized for secretly throttling distillation attempts in its new claude fable 5 model and will now make all safety refusals visible, bowing to researcher backlash.
after facing backlash for degrading responses to suspected distillation attempts without notice, anthropic reversed course on its handling of claude fable 5 safeguards. the company admitted that prioritizing invisible, narrow safeguards over robust, visible ones was a mistake and will now explicitly tell users when a query is routed to its older claude opus 4.8 model or blocked. this shift follows criticism that silent interference undermined the ability of researchers and third parties to evaluate frontier models accurately. anthropic had previously defended the covert measures as necessary to stop rivals like deepseek from using its outputs to train competing systems.