Anthropic Claude Sonnet 4 and Claude Opus 4 deprecated; retirement on 2026-06-15; migrate to Sonnet 4.6 / Opus 4.6
Action Required
Applications using Claude Sonnet 4 or Claude Opus 4 must migrate to Claude Sonnet 4.6 or Claude Opus 4.6 by 2026-06-15 to avoid service disruption.
AI Impact Summary
Anthropic has announced deprecation for Claude Sonnet 4 and Claude Opus 4 with a retirement date of 2026-06-15. This affects production pipelines relying on these models; migrating to Claude Sonnet 4.6 or Claude Opus 4.6 will be necessary to avoid service disruption. Expect potential differences in prompt handling, context length, and response formats between 4 and 4.6, so validate prompts, token budgets, and any integration wrappers before cutover. Establish a migration window and update monitoring to track endpoint availability and error rates during the transition.
Affected Systems
- Date
- Date not specified
- Change type
- deprecation
- Severity
- high