The AI Models Index tracks model releases with verified public release dates...
https://garrettwigp625.tearosediner.net/what-is-openai-s-expected-next-premium-release-window-in-the-timeline
The AI Models Index tracks model releases with verified public release dates and blind-vote checks, so you can compare changes before upgrading. Across 178 releases, it helps teams spot meaningful gains and avoid versions that may set them back.