HighDeprecation
Claude Sonnet 4 and Claude Opus 4 deprecated; retirement June 15, 2026 — migrate to Claude Sonnet 4.6
Action Required
Applications using Claude Sonnet 4 or Claude Opus 4 must migrate to Claude Sonnet 4.6 by June 15, 2026 to avoid service disruption.
AI Impact Summary
Claude Sonnet 4 (claude-sonnet-4-20250514) and Claude Opus 4 (claude-opus-4-20250514) are deprecated, with retirement scheduled for 2026-06-15. Organizations must migrate all workloads to Claude Sonnet 4.6; update API calls to use the new model name and validate any differences in prompting, token usage, or response formats. Plan a staged migration with testing in non-prod, then rollout before the deadline to avoid disruption.
Claude Sonnet 4 and Claude Opus 4 deprecated; retirement June 15, 2026 — migrate to Claude Sonnet 4.6
Affected Systems
Claude Sonnet 4 (claude-sonnet-4-20250514)
- Date
- Date not specified
- Change type
- deprecation
- Severity
- high