Anthropic releases Claude Fable 5.1 and Mythos 5.1, cutting cache read prices by 75%

Anthropic has released Claude Fable 5.1 and Mythos 5.1, the same model with different safeguards, cutting cache read prices by 75% and reporting 52.6% on a scientific research benchmark against 24.7% for its predecessor. Its outputs carry a watermark required by the EU AI Act, and the detection API is in private preview for eligible […] This story continues at The Next Web

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