F
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Anthropic's Claude Fable 5 includes undisclosed interventions that silently degrade responses for certain ML development tasks - no fallback notice, no refusal, just worse answers.
3 articles
Claude Fable 5 routes blocked queries to Opus 4.8 rather than refusing outright - but the fallback is not automatic for API users and requires explicit configuration. Here is the complete developer guide to the refusal architecture.
Anthropic's Claude Fable 5 includes undisclosed interventions that silently degrade responses for certain ML development tasks - no fallback notice, no refusal, just worse answers.

A trending refusal-direction paper is a reminder that model safety cannot be treated as a thin refusal layer. Builders need layered controls around the model.
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