The AI Models Index helps teams judge whether a model upgrade is worth the...

https://garrettwigp625.tearosediner.net/what-is-openai-s-expected-next-premium-release-window-in-the-timeline

The AI Models Index helps teams judge whether a model upgrade is worth the switch, using verified public release dates and blind-vote checks to compare versions. Across 178 releases, upgrades improved results 56% of the time.