It really depends on what you're trying to do and how much you can spend. For that quantity, an fpga might be better, although you won't find $1 per chip. And y

It really depends on what you're trying to do and how much you can spend. For that quantity, an fpga might be better, although you won't find $1 per chip. And you can program it in Verilog. If you really want to go low, look up what's currently available in printed electronics. But you might have to do your own transistor layouts.