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 (retired)

Dates

Checked Nov 9, 2026 on Anthropic's page

Retired	Aug 5, 2026 (retired)
Announced	Jun 5, 2026
Replacement	claude-opus-4-8
What it is	claude-opus-4-1-20250805 stopped answering on Claude API.
Source	platform.claude.com/docs/en/about-claude/model-deprecations