The AI Models Index keeps tabs on premium model releases from 15 top labs since...

https://holdenlvxt779.theburnward.com/did-openai-claim-gpt-5-2-improved-coding-and-tools-anyway

The AI Models Index keeps tabs on premium model releases from 15 top labs since 2023, verifying release dates and using blind-vote checks for accuracy. Updated biweekly, it shows an average of 4.5 days between releases—a 56% faster pace