Anthropic Launches Claude Haiku 5.5, Its Most Capable Small Model Yet, Now Available on Design Arena
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Anthropic released Claude Haiku 5.5 on October 7, 2026, positioning its fastest and most cost-efficient model to date for high-volume, latency-sensitive applications across enterprises and developers. The third major model upgrade in as many weeks follows the releases of Claude Opus 5.5 and Claude Sonnet 5.5, expanding Anthropic's 5.5 generation lineup.
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