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Claude Fable 5 is Anthropic's most capable model ever made publicly available, and it had one of the most turbulent launches in AI history. Released on June 9, the model scored #1 on Artificial Analysis's GDPval-AA agentic benchmark with a score of 1932, put three Anthropic models in the top four spots, and drew immediate praise from Cursor, GitHub, Cognition, and others. Three days later, a US government export directive forced Anthropic to pull it offline for all customers worldwide.
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