Fable 5.1 includes changes meant to reduce token cost and false-positive restrictions from the model's safeguards.

Anthropic has cut a Fable 5.1 cache hit to just $0.25 on input, down from $1.00 for Fable 5. That's also just 2.5% of Fable's normal input-token price of $10, rather than the 10%…

Fable 5.1 includes changes meant to reduce token cost and false-positive restrictions from the model's safeguards.