claude-3-opus-20240229 retirement date and replacement

Name: claude-3-opus-20240229 retires (Claude API)
Start: 2026-01-05
End: 2026-01-05

Claude API · Model · retired Jan 5, 2026 (retired)

Dates

Checked Nov 9, 2026 on Anthropic's page

Retired	Jan 5, 2026 (retired)
Announced	Jun 30, 2025
Replacement	claude-opus-4-8
What it is	claude-3-opus-20240229 stopped answering on Claude API.
Source	platform.claude.com/docs/en/about-claude/model-deprecations