Comment by stereolambda

When some closed models are "retired", interestingly we might not even be able to extract all their tells. We'd be limited to people writing about them on forums (where they don't often specify version, and there's a lot of memes and confirmation bias) and I don't know, doing some statistical Bayesian guessing that given the likelihood it's FooGPT 10.5, maybe we should update our beliefs about its characteristics etc.