Anthropic Enforces Hard Retirement for Two Claude 4 Models Today — Sonnet-4-20250514 and Opus-4-20250514 Cut Off June 15, 2026
Anthropic’s official Claude API deprecation documentation confirms that today, June 15, 2026, marks the retirement date for two specific versioned models. API calls using the exact identifiers claude-sonnet-4-20250514 and claude-opus-4-20250514 will now fail. The page, which serves as Anthropic’s authoritative and up-to-date deprecation history, lists the following details for the affected models: Anthropic states that…