The AI Models Index tracks 178 releases with verified public release dates and...

https://emiliosbestinsights.rivetgarden.com/posts/how-long-did-gemini-4-argon-take-from-1-to-public-release

The AI Models Index tracks 178 releases with verified public release dates and blind-vote checks, so you can compare real-world results instead of relying on launch claims. See a model’s 4.5-day lead time and decide whether an upgrade is worth the switch.