claude-opus-4-1-20250805 retirement date and replacement

Name: claude-opus-4-1-20250805 retires (Claude API)
Start: 2026-08-05
End: 2026-08-05

Claude API · Model · retired Aug 5, 2026 (51 days ago)

Dates

Checked Sep 25, 2026 on Anthropic's page

Retired	Aug 5, 2026 (51 days ago)
Announced	Jun 5, 2026
Replacement	claude-opus-4-8
Notice	Claude Opus 4.1 model 
Source	platform.claude.com/docs/en/about-claude/model-deprecations