CriticalDeprecation
Anthropic Deprecating Claude Haiku 3.5 and Claude Sonnet 3.7 Models
Action Required
Applications relying on Claude Haiku 3.5 or Claude Sonnet 3.7 will no longer function after April 19, 2026, requiring immediate migration planning.
AI Impact Summary
Anthropic is deprecating the Claude Haiku 3.5 model (claude-3-5-haiku-20241022) and the Claude Sonnet 3.7 model (claude-3-7-sonnet-20250219), with the Claude Haiku 3.5 model sunsetting on April 19, 2026. Users should migrate to Claude Haiku 4.5 and Claude Sonnet 4.6 respectively to avoid service disruption. This impacts applications currently relying on these models for their specific use cases.
Anthropic Deprecating Claude Haiku 3.5 and Claude Sonnet 3.7 Models
Affected Systems
Claude Haiku 3.5
- Date
- 19 Apr 2026
- Change type
- deprecation
- Severity
- critical