According to Chad Greedy, Adam Ondra has made the first ever flash ascent of Daniel Woods' Jade, ~8B+, in the Upper Chaos Canyon, RMNP, Colorado.

Watch The Video (press play then maximise the video):

After the Vail World Cup, where he finished 3rd, it seems he had some energy left and, knowing Adam, he most definitely knew what he wanted to do, and after flashing Don't get too greedy, ~8B, as a warm up, he made Jade look easy...

Originally 8C was suggested for the problem, but it has now since long settled at 8B+.

This grade has been flashed before by Woods (Entlinge, Murgtal) and by Adam himself twice (Confessions, Cresciano and Gecko assis, Fontainebleau).

Still, I would say this is probably the hardest flash ever.