Claude Haiku 3 retired; migrate to Claude Haiku 4.5

AI Impact Summary

Claude Haiku 3 (claude-3-haiku-20240307) has been retired, and all requests now require Claude Haiku 4.5. This means any existing integrations still calling claude-3-haiku-20240307 will fail until updated to reference Claude Haiku 4.5; teams should update API calls, client libraries, and deployment configurations to point to the new model. Expect differences in capabilities and prompt handling between 3 and 4.5, so validate prompts, max tokens, and request/response patterns. Plan a migration window, run parallel tests if possible, and implement a rollback path if 4.5 introduces incompatibilities.