Claude Opus 4.1 · deprecatedclaude-opus-4-1-20250805

Valid from

2026-06-05

Valid until

still holds

Published

no source on record carries a date

Recorded by AsOf

2026-11-04

Checked

2026-11-04 · its source page states the value and the date

Confidence

0.95

Sources

“claude-opus-4-1-20250805 Retired June 5, 2026 August 5, 2026”— what the page says, read 2026-11-04

• https://platform.claude.com/docs/en/about-claude/model-deprecationsprimary · platform.claude.com

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