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Anthropic releases Claude Haiku 5.5, its fastest and cheapest small model

anthropic.com · 2026-10-08

Announced Oct 7, Haiku 5.5 is positioned for high-volume, cost-sensitive work and completes Anthropic's 5.5 model family. Pricing war context: Verge reports it costs around 75% less than Haiku 4.5 and is the first Haiku-class model with adjustable effort.

“Our fastest, cheapest, and most capable small model yet.”

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