There is no evidence TMK that the accuracy the models change due to release cycles or capacity issues. Only latency. Both Anthropic and OpenAI have stated they don't do any inference compute shenanigans due to load or post model release optimization.

Tons of conspiracy theories and accusations.

I've never seen any compelling studies(or raw data even) to back any of it up.

my source is that people have been noticing this since GPT4 days.

https://arxiv.org/pdf/2307.09009

but of course, this isn't a written statement by a corporate spokespersyn. I don't think that breweries make such statements when they water their beer either.