https://support.chess.com/customer/en/portal/articles/1444879-fair-play-on-chess-com-what-you-need-to-know
Discussions of engine use in online games belongs in the following group.
https://www.chess.com/groups/home/cheating-forum
And yes, modern engines are strong enough to beat GMs, even with odds.
I encountered many players who used engine as there moves were so accurate & futuristic. I was unable to beat them in successive games. I am much strong player and beat title players but these engines are more powerful. Question is are there any measures that anyone can't use powerful engines (but for analysis only) without permission from engine provider/creator (like stockfish, comodo...). Else in online games no one knows who is getting something big from engine illegally and who is hitting their head on wall for losing against engine when fide released online rating & games saying "yo man it's online revolution". in summary, how to stop anyone from getting powerful engine moves to be used in game. a related question - are the current engines we dowload and use for analysis so powerful that by those moves it's possible to beat IM GM?