Claude · default modelClaude Sonnet 4.6

Superseded: a later claim replaced it. It was the record's answer for the dates it held.

Valid from

2026-02-17

Valid until

2026-06-30

Published

2026-02-17

Recorded by AsOf

2026-11-04

Checked

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

Confidence

0.95

Replaced by

Claude Sonnet 5

Sources

“For those on our Free and Pro plans , Claude Sonnet 4.6 is now the default model in claude.ai and Claude Cowork .”— what the page says, read 2026-11-04

• Introducing Claude Sonnet 5primary · anthropic.com · 2026-06-30
• Introducing Sonnet 4.6primary · anthropic.com · 2026-02-17

Supersedes

• Claude Sonnet 42025-05-22 to 2025-09-29 · clm_E6D59A90B884

/claim/clm_50F23B443136.md/v1/claims/clm_50F23B443136timelinesubmit a correction