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Anthropic will not release any Claude Haiku 4.6+ model on October 21, 2026. Anthropic announced on September 22, 2026 alongside Claude Opus 5.5 that "Claude Sonnet 5.5 and Claude Haiku 5.5 will follow in the coming weeks," but as of October 2 Anthropic had not provided an exact release date. Indust…