HighDeprecation
Claude Sonnet 4 and Claude Opus 4 deprecated; retirement on 2026-06-15 — migrate to Claude Sonnet 4.6
Action Required
Applications using Claude Sonnet 4 or Claude Opus 4 must migrate to Claude Sonnet 4.6 before the 2026-06-15 retirement to avoid service disruption.
AI Impact Summary
Claude Sonnet 4 and Claude Opus 4 are deprecated with retirement scheduled for 2026-06-15 on the Claude API, requiring a migration to Claude Sonnet 4.6. This affects any production workloads relying on those models; you should redirect endpoints to Sonnet 4.6 and validate feature parity, including prompt handling and response formats. Plan a controlled migration, update API clients, and run regression tests to confirm latency, token behavior, and output compatibility before the deadline.
Claude Sonnet 4 and Claude Opus 4 deprecated; retirement on 2026-06-15 — migrate to Claude Sonnet 4.6
Affected Systems
Claude Sonnet 4
- Date
- Date not specified
- Change type
- deprecation
- Severity
- high