BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//StackClock//Deadlines//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Anthropic deprecations (StackClock)
REFRESH-INTERVAL;VALUE=DURATION:PT6H
BEGIN:VEVENT
UID:change-01a1083c-b058-7d00-96e4-0999cbef6242@stackclock.app
DTSTAMP:20261004T184557Z
DTSTART;VALUE=DATE:20261130
DTEND;VALUE=DATE:20261201
SUMMARY:Anthropic: 2026-09-30: Claude Sonnet 4.5 model 
DESCRIPTION:On September 30\, 2026\, Anthropic notified developers using Cl
 aude Sonnet 4.5 of its upcoming retirement on the Claude API.\n\nRetiremen
 t date Deprecated model Recommended replacement\nNovember 30\, 2026 claude
 -sonnet-4-5-20250929 claude-sonnet-5-5
URL:https://stackclock.app/changes/01a1083c-b058-7d00-96e4-0999cbef6242
TRANSP:TRANSPARENT
END:VEVENT
END:VCALENDAR