AsOf

Claude Sonnet 4 · predecessorClaude Sonnet 3.7

validasserted
Valid from
2025-05-22
Valid until
still holds
Published
2025-05-22
Recorded by AsOf
2026-11-04
Checked
2026-11-04 · its source page states the value and the date
Confidence
0.95

Sources

“Claude Sonnet 4 is a significant upgrade to Claude Sonnet 3.7, delivering superior coding and reasoning while responding more precisely to your instructions.”— what the page says, read 2026-11-04