CriticalDeprecation
Anthropic retiring Claude Sonnet 3.7 and Haiku 3.5 models
Action Required
Applications using Claude Sonnet 3.7 or Haiku 3.5 will no longer function after February 19, 2026, necessitating immediate migration to the supported models.
AI Impact Summary
Anthropic is retiring the Claude Sonnet 3.7 and Haiku 3.5 models, marking a critical change for any applications relying on these models. This deprecation requires immediate migration to the newer Claude Sonnet 4.6 and Claude Haiku 4.5 models to avoid service disruptions. The source content highlights the availability of the External Researcher Access Program for ongoing research access.
Anthropic retiring Claude Sonnet 3.7 and Haiku 3.5 models
Affected Systems
Claude Sonnet 3.7
- Date
- Date not specified
- Change type
- deprecation
- Severity
- critical