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Anthropic releases Claude Fable 5 and Mythos 5 models

Claude Fable 5 debuts at #1 on the Artificial Analysis Intelligence Index with a score of 64.9, leading competitors by nearly 5 points. The model shares its underlying architecture with Claude Mythos 5 and is now available as an orchestrator for long-running agentic workflows in Perplexity Computer.

Anthropic releases Claude Fable 5 and Mythos 5 models — AIBriefs