You asked
Is the nikon af s 85mm f 1 4g sharp wide open?
I don't have sharpness test results for the Nikon AF-S 85mm f/1.4G, so I can't tell you how crisp it is at f/1.4. What the page does cover is that it's an 85mm prime for full frame, with autofocus, a Nikon F mount, and no stabilisation. On full frame it frames as 85mm, and on APS-C it behaves like about 128mm.
At f/1.4 the depth of field is very thin, so focus has to land exactly on the eye. Stopping down to f/2.8 is a safe move when you're shooting two people at different distances. You can read more on the Nikon AF-S 85mm f/1.4G page and the Portraits guide.
Written by Claude from this site's pages.