Why isn’t the model offered by Google in the same category? Or did I misunderstand their latest naming fiasco and “Gemini Pro” is not actually their latest mode

Why isn’t the model offered by Google in the same category? Or did I misunderstand their latest naming fiasco and “Gemini Pro” is not actually their latest model? EDIT: It looks like Gemini Ultra 1.0 > Gemini Pro 1.5 > Gemini Pro 1.0… is that true? What a horrible versioning scheme.