From July 16 to July 19, Hou played in the 5th leg of the FIDE Women's Grand Prix 2011–2012 held in Jermuk, Armenia. She won the event with a 7/11 score (+4 −1 =6, TPR 2598). This victory added to her victories in Rostov 2011 and Shenzeng 2011 made Hou the winner of the FIDE Women's Grand Prix 2011–2012 and secured for herself the challenger spot for the Women's World Chess Championship 2013.