Show HN: How Stale Is Your AI? Release age and training cutoff for 20 models

How stale is your AI? Data checked 2026-09-10

Two dates decide how current an AI model really is. The release date is when the lab shipped it. The training cutoff is when it stopped reading. This page holds both for 20 current models across 8 labs, and counts upward from each one live. 9 of 20 models have a cutoff their lab actually publishes.

The live version of this page needs JavaScript for the counters. The dates themselves are below, and the same data is available as models.json .

The training cutoff is the date a model stopped reading. Everything that happened after it is simply absent from what the model knows. A model can ship in September and still stop reading in April, which means it is five months behind on the day it launches.