Modelpeers

Claude Haiku 3

Model at Anthropic

Retired

Claude Haiku 3 retired

Requests to claude-3-haiku-20240307 now return an error. The deprecation was announced on February 19, 2026.

Who is affected:
Apps still calling claude-3-haiku-20240307.
Action needed:
Switch to Claude Haiku 4.5 or Haiku 5.5.

Source

"We've retired the Claude Haiku 3 model (claude-3-haiku-20240307). All requests to this model will now return an error."

Claude Platform release notes (API)

Published

Open the sourceplatform.claude.com

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