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img of Claude Fable 5: Anthropic's First Mythos-Class Model Is Now Public
• 7 min read

Claude Fable 5: Anthropic's First Mythos-Class Model Is Now Public

Anthropic released Claude Fable 5 — the first Mythos-class model available to all developers. 80.3% on SWE-bench Pro, adaptive thinking always on, 1M context. Here's how to use it and when to route to it.