There is a new frame out from VB for cyclocross (and/or lighter gravel use):
http://www.velobuild.com/products/velobuild-2023-new-cx-002-carbon-fiber-cyclocross-frame-full-inner-routing

It looks like a 168 (so slightly aero), but with 42mm tire clearance, more CX friendly geometry, and a horizontal feature above the BB for structural rigidity?   I'm not familiar with other cross bikes outside of the big 3, but it doesn't seem to look like anything else... that BB feature is distinctive though.  (12/21 EDIT: The shape is similar to the 168/Tarmac-SL7, but with Trek Boone-ish Geo)

I added a couple charts to compare to the 168 and the 2 current GF gravel frames.


I'm currently shopping this bike as a road/light-gravel bike with 2 wheelsets.  One with GP5k's/25mm and another with Pathfinder-Pro's in either 32 or 38mm.