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Anthropic will release Claude Haiku 5.5 to the public by October 15, 2026. The company itself signaled the move in its September 22, 2026 Claude Opus 5.5 announcement when it said "Claude Sonnet 5.5 and Claude Haiku 5.5 will follow in the coming weeks," and as of September 23, 2026 Anthropic's docu…