Board Thread:Questions and Answers/@comment-27750554-20160416022746/@comment-73.176.47.202-20160530155836

It has been made very clear that Arima only allows Kaneki to live because he is truly the only ghoul who has any chance against him. The whole reason he spared Kaneki in the beginning was because he was able to scratch him, a feat no other ghoul had achieved (besides Minami, who is dead).

Unless Kaneki develops some kind of hidden power that develops along with his new resolve to live, I highly doubt he can continue his struggle with Arima for much longer.

I don't think he will die though. If anything, Ishida will probably throw a trump card or something unexpected that allows Kaneki to kill Arima, or ends with the death of Arima.