HighDeprecation
Claude Sonnet 4 and Claude Opus 4 retirement announced; migrate to Claude Sonnet 4.6 by June 15, 2026
Action Required
Applications using Claude Sonnet 4 or Claude Opus 4 must migrate to Claude Sonnet 4.6 before June 15, 2026 to avoid production outages.
AI Impact Summary
Claude Sonnet 4 and Claude Opus 4 are slated for retirement on June 15, 2026. The recommended upgrade path is Claude Sonnet 4.6, so teams must plan to migrate workloads, update API clients, and revalidate prompts and response patterns to preserve behavior. This deadline requires cross-team coordination to avoid production outages and potential feature gaps in critical flows using these models.
Claude Sonnet 4 and Claude Opus 4 retirement announced; migrate to Claude Sonnet 4.6 by June 15, 2026
Affected Systems
Claude Sonnet 4
- Date
- Date not specified
- Change type
- deprecation
- Severity
- high