Did you see Gemini 1.5 pro vs 2.5 pro?

Sure, but despite there being a 2.0 release between they didn't even feel the need to release a Pro for it still isn't the kind of GPT 2 -> 3 improvement we were hoping would continue for a bit longer. Companies will continue to release these incremental improvements which are all always neck-and-neck with each other. That's fine and good, just don't inherently expect the versioning to represent the same relative difference instead of the relative release increment.