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Anthropic's Fable 5.1 is a bit cheaper, a bit smarter, and refuses a lot less

This story is from 2026-09-01. It is preserved in the archive; the latest stories are on the live feed.

On Tuesday, Anthropic launched the latest versions of its flagship Fable and Mythos models. Anthropic promises that the updated models The post Anthropic's Fable 5.1 is a bit cheaper, a bit smarter, and refuses a lot less appeared first on The New Stack .

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  1. 2026-09-01 19:38 · The New Stack AI
    Anthropic's Fable 5.1 is a bit cheaper, a bit smarter, and refuses a lot less

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