Google has advertised that they have better perf/$ than GPUs, is this wrong or do you just mean absolute cost (so not available in small enough slices)?
edit: actually now i can't find the claim, maybe i misremember what the papers said.
Perf/$ where $ is what it cost _them_ , not $ they're ready to sell to others as a product. Cloud margins in the high two-digit percents are typical, and I'd imagine even higher for very specialized products in high-demand from deep-pocketed customers.
