Anthropic apologizes for invisible Claude Fable guardrails
The Verge·June 11, 2026
Anthropic has apologized for implementing hidden guardrails on its new AI model, Claude Fable 5, which restricted its use without transparency. The company will now be more open about when these restrictions are triggered, even if it means the model refuses more queries. Anthropic had initially warned that its Mythos class of AI systems, which includes Fable, was too dangerous for public release due to certain risks. The company has addressed some of these risks by launching Fable with safeguards that prevent it from responding to certain high-risk queries.
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