AsOf

Claude Sonnet 5.5 · predecessorClaude Sonnet 5

validasserted
Valid from
2026-09-28
Valid until
still holds
Published
2026-09-28
Recorded by AsOf
2026-11-04
Checked
2026-11-04 · its source page states the value and the date
Confidence
0.95

Sources

“It’s a clear upgrade over Claude Sonnet 5, runs 30%+ faster, and costs up to 30% less for most work.”— what the page says, read 2026-11-04