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Dark violet cover with white type reading "Claude Haiku 5.5 released" beside an abstract row of rising bars and a slider running from lower cost to more effort
AI model news ·

Anthropic Claude Haiku 5.5 release on October 7, 2026: what's new

Anthropic released Claude Haiku 5.5 on October 7, 2026: its fastest model and the first Haiku with an effort setting.

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