It appears possible or likely that the OTHER arxiv pre-print "The First Room-Temperature Ambient-Pressure Superconductor" (the 3 author one - https://arxiv.org/abs/2307.12008) was uploaded without certain authors' permissions, and may be retracted for non-technical reasons.

This market refers to the 6-author pre-print, "Superconductor Pb10−xCux(PO4)6O showing levitation at room temperature and atmospheric pressure and mechanism" (https://arxiv.org/abs/2307.12037) uploaded on the same day.

This market resolves positively if the pre-print is retracted from arxiv for any reason by 11:59pm on December 31st, 2023.