Anthropic is retiring specific versions of its Claude 4 Opus and Sonnet models, claude-opus-4-20250514 and claude-sonnet-4-20250514, on June 15, 2026. This deprecation affects not only direct calls to these snapshot IDs but also the versioned aliases like `claude-opus-4-0` and `claude-sonnet-4-0` that resolve to them. Developers using these models should update their code to reference newer versions, such as `claude-opus-4-1`, and be aware that partner platforms like AWS Bedrock and Google Vertex AI may have different retirement schedules. Additionally, teams relying on mocked SDK tests or model-router fallback configurations need to implement integration tests against live APIs to ensure their systems do not silently fail after the June 15 deadline. AI
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IMPACT Developers must update integrations to avoid service disruptions from retired model versions.
RANK_REASON This is a notice about model deprecation and its impact on existing integrations, not a new model release.