  An important area of high energy physics studies at the Large Hadron Collider
(LHC) currently concerns the need for more extensive and precise comparison
data. Important tools in this realm are event reweighing and evaluation of more
precise next-to-leading order (NLO) processes via Monte Carlo event generators,
especially in the context of the upcoming High Luminosity LHC. Current event
generators need to improve throughputs for these studies. MadGraph5_aMC@NLO
(MG5aMC) is an event generator being used by LHC experiments which has been
accelerated considerably with a port to GPU and vector CPU architectures, but
as of yet only for leading order processes. In this contribution a prototype
for event reweighing using the accelerated MG5aMC software, as well as plans
for an NLO implementation, are presented.
