Claude Opus 4.8 · model releaseClaude Opus 4.8

Valid from

2026-05-28

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

“May 28, 2026 We’ve launched Claude Opus 4.8 ( claude-opus-4-8 ), our most capable model.”— what the page says, read 2026-11-04

• https://platform.claude.com/docs/en/release-notes/overviewprimary · platform.claude.com

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