Nope, as far as I know it has not gone up. It's about the same price as grab. I checked on grab how much it'll cost to go to asok area from the airport but I took the taxi because it was a lot easier and faster cuz I didn't have to wait for the grab to arrive. With the meter on the price on the taxi was about 20-50 baht more by the time i got to my airbnb, total was about 350-400 baht I forgot exactly how much.