BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ModelClock//Model lifecycle//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:ModelClock shutdowns
BEGIN:VEVENT
UID:yh5wyt@modelclock
DTSTAMP:20261005T212357Z
DTSTART;VALUE=DATE:20261024
DTEND;VALUE=DATE:20261025
SUMMARY:Perplexity Agent: openai/gpt-5.1 shutdown
DESCRIPTION:Perplexity Agent publishes 2026-10-24 as the shutdown date. A
 gent API and Router API.\nHosting: Perplexity Agent platform\nSource: ht
 tps://docs.perplexity.ai/docs/resources/changelog
URL:https://0.0.0.0:3000/models/perplexity-agent/openai%2Fgpt-5.1
END:VEVENT
END:VCALENDAR