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DocsAnthropic
- Severity
- Critical
- Published
- 6 days agoApr 20, 2026
- Signal
- 91
Claude Haiku 3 retired from the Claude API
We've retired the Claude Haiku 3 model ( claude-3-haiku-20240307 ). All requests to this model will now return an error. We recommend upgrading to Claude Haiku 4.5.
Official source entry
Claude Haiku 3 retired from the Claude API
From Platform Release Notes. The simplified record can be checked against the original wording.
Why it matters
Anthropic updated platform release notes semantics for llms and agents. Review the official entry before the next deploy.
Who should care
- ai
- product
Affected stack
- llms
- agents
Categories
breakingmodelapi