Distillation attacks are the reason Anthropic has started billing again for some requests Claude refuses before answering. From 24 September 2026, blocked requests in three categories, bio, frontier_llm and reasoning_extraction, are charged at the refusing model’s input rates. This article explains what each category covers, the 114 days when refusals were free, what a billed block costs and what developers should change.
Mythos 5.1 is the version of Anthropic’s newest frontier model that almost nobody is allowed to use. In September 2026 the company announced Claude Fable 5.1 and Claude Mythos 5.1 together, and it is unusually direct about what separates them: nothing at all, except the safeguards wrapped around the weights. Fable 5.1 is generally available. […]
Claude Fable 5.1 is now listed on AIxploria, the AI tools directory that catalogues thousands of AI sites across more than fifty categories. The new card sits at number one on the directory’s “Latest AI” feed, carries a Gold Verified badge, is priced “Paid”, and files Anthropic’s frontier model under LLM models and SuperTools. For […]
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