They even priced it so people would avoid using it. GPT-4.5's entire function was to be the anchor of keeping OpenAI in the news, to keep up the perception of releasing quickly.
My assumption was that the pricing was because it really was that expensive for whatever reason. I'm keeping fingers crossed that they're going to do some kind of 4.5 mini at some point that will be more affordable.
"It beats all the benchmarks...but you really really don't want to use it."