Anthropic Deprecating Claude Haiku 3 on April 19 — Migration to Haiku 4.5 Required

Anthropic·medium signal

Anthropic scheduled Claude Haiku 3 (claude-3-haiku-20240307) for retirement on April 19, 2026, recommending migration to Claude Haiku 4.5. This is the second-to-last original Claude 3 model to be deprecated, following the Opus 3 retirement controversy earlier this year. Developers with production workloads on Haiku 3 have 17 days to migrate.