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DocsAnthropic
- Severity
- Critical
- Published
- 12 days agoApr 14, 2026
- Signal
- 86
Claude Sonnet 4 and Claude Opus 4 deprecation announced
We announced the deprecation of the Claude Sonnet 4 model ( claude-sonnet-4-20250514 ) and the Claude Opus 4 model ( claude-opus-4-20250514 ), with retirement on the Claude API scheduled for June 15, 2026. We recommend migrating to Claude…
Official source entry
Claude Sonnet 4 and Claude Opus 4 deprecation announced
From Platform Release Notes. The simplified record can be checked against the original wording.
Why it matters
Anthropic updated platform release notes semantics for llms and agents. Review the official entry before the next deploy.
Who should care
- ai
- product
Affected stack
- llms
- agents
Categories
breakingmodelapi