Silence has yet to be repeated, but Ondra isn't generally one to give soft grades. Only one of Ondra's 5.15c routes, La Dura Dura, has been repeated, which suggests that it might be a while before anyone manages to catch up to Ondra.

Is silence actually 9c?

Silence (formerly known as Project Hard) is a notoriously difficult climbing route located in the Hanshelleren Cave in Flatanger, Norway. As of August 2021, it is still considered to be the hardest route ever climbed, and the only route in the world to have a proposed rating of 9c (5.15d).

Is bibliographie really 9c?

Italian climber Stefano Ghisolfi has made the second ascent of Alex Megos' Bibliographie, the world's second 9c. He is the third climber to reach the grade after Adam Ondra and Megos.