First GPT-4o, Now Opus 4.5. We’re All Building on Rented Land.

Anthropic removed Opus 4.5 this week. No email. No in-app notice. Just gone. If you’ve been paying attention, this feels familiar. Because it is. The Timeline Nobody Asked For February 13, 2026. OpenAI deprecates GPT-4o. Users who built entire workflows around it wake up to find it replaced. The subreddit turns into a group. March 11, 2026. GPT-5.1 quietly disappears. The model many users fled to after 4o. The one they thought was safe. Gone. April 14, 2026. Anthropic announces Claude Opus 4.5 deprecation. Users discover it’s being retired June 15. Reddit explodes. Again.