AsOf

Claude Opus 5 · model releaseClaude Opus 5

validasserted
Valid from
2026-07-24
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

“July 24, 2026 We’ve launched Claude Opus 5 ( claude-opus-5 ), a step-change improvement over Claude Opus 4.8.”— what the page says, read 2026-11-04