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Anthropic Joins AI Price War With Release of Fable 5.1.

AI BusinessIndependent reporting·
AI brief

Anthropic released Fable 5.1 and cut its cache read pricing, saying the model is similar to Mythos 5.1 but with different safeguards.

Why it matters: It places Anthropic in an ongoing AI price competition through lower cache read costs.

Written by AI from AI Business's published text.

Background

From our own funding, model and news trackers, not from the source.

Source

“The vendor reduced cache read pricing for Fable 5.1 and said the model is similar to Mythos 5.1, with different safeguards.”
AI Business, 02 Sept 2026, 13:54.

Reporting from a publisher outside the organisation being covered.

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