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Anthropic's Claude Fable 5.1 and Mythos 5.1 arrive with a 75% cost reduction for Fable cache reads

2 reports Updated Sep 1, 2026

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This page brings together 2 related reports covering Anthropic's Claude Fable 5.1 and Mythos 5.1 arrive with a 75% cost reduction for Fable cache reads . The latest coverage appears first.