Claude · discontinuedClaude Sonnet 4 model

Valid from

2026-06-15

Valid until

still holds

Published

2026-06-15

Recorded by AsOf

2026-10-31

Checked

2026-10-31 · its source page states the value and the date

Confidence

0.70

Sources

“June 15, 2026 We’ve retired the Claude Sonnet 4 model ( claude-sonnet-4-20250514 ) and the Claude Opus 4 model ( claude-opus-4-20250514 ). All requests to these models on the Claude API will now return an error.”— what the page says, read 2026-10-31

• Claude Platform release notes, June 15, 2026primary · platform.claude.com · 2026-06-15

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