HighDeprecation
Anthropic retiring Claude Sonnet 4 and Opus 4 by June 2026 — migrate to Sonnet 4.6
Action Required
Any application or workflow using claude-sonnet-4-20250514 or claude-opus-4-20250514 endpoints will break after June 15, 2026 without migration to supported model versions.
AI Impact Summary
Anthropic is retiring two Claude model versions with a June 15, 2026 deadline: claude-sonnet-4-20250514 and claude-opus-4-20250514. Applications calling these specific model endpoints will fail after the cutoff date. Claude Sonnet 4.6 is positioned as the direct replacement, offering improved performance at comparable pricing, but teams using fine-tuned versions of these models will need to evaluate whether fine-tunes transfer or require retraining on the new model versions.
Anthropic retiring Claude Sonnet 4 and Opus 4 by June 2026 — migrate to Sonnet 4.6
Affected Systems
Claude Sonnet 4
- Date
- Date not specified
- Change type
- deprecation
- Severity
- high