Model and API retirements

Within 30 days64Firm dates ahead558

64 within 30 days · 558 firm dates ahead

claude-sonnet-4-6 retirement date and replacement

Claude API · Model · not sooner than Feb 17, 2027

Vendor page

Dates

Checked Nov 9, 2026 on Anthropic's page
Not sooner thanFeb 17, 2027 (not sooner than)The earliest date the vendor gives for a current model; the real date is announced later.
ReplacementNone named
Model pageclaude-sonnet-4-6 on Models
What it isclaude-sonnet-4-6 stops answering on Claude API no sooner than Feb 17, 2027.
Sourceplatform.claude.com/docs/en/about-claude/model-deprecations

Around the same time on Claude API

Anthropic
Claude APIModel

claude-opus-4-6

Stops answering on Claude API no sooner than Feb 5, 2027.

not sooner thanFeb 5, 2027