When the OnePlus 7 Pro launched in the US the handset was available with three RAM options, 6GB, 8GB and 12GB.
Now OnePlus has removed the 6GB and 12GB of RAM options and the only model you can buy is the 8GB of RAM version.
OnePlus recently launched their new OnePlus 7T Pro smartphone which is an updated version on the OnePlus 7 Pro, the company has not launched this handset in the US as yet.
So on only option at the moment for the Pro model is the 8GB version and this is now available in the US for $649.
Source 9 to 5 Mac