Claude 1 · deprecatedclaude-1.3

Valid from

2024-09-04

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

“On September 4, 2024, Anthropic notified developers using Claude 1 and Instant models of their upcoming retirements.”— what the page says, read 2026-11-04

• https://platform.claude.com/docs/en/about-claude/model-deprecationsprimary · platform.claude.com

/claim/clm_FA2834065240.md/v1/claims/clm_FA2834065240timelinesubmit a correction