Yeah IIRC the latest Pro is $12 and Flash is $9 which is not the usual 2X-3X multiplier we see separate model grades. It also puts Flash now about 2X GLM 5.2, which is a highly capable open weight model.
I think the thing is that 3.5 flash is actually similarly capable on a lot of tasks that matter and is faster. Pro is more specialised in the direction of mathematical reasoning and stuff.