Have seen both used. Some articles typically say "The antihero is back", whilst others say he is a hero. Breeanna Hare at CNN even gets to the point by:
-- At first it may seem "24's" Jack Bauer didn't get the memo.
In 2014, our heroes now wear capes and fight the bad guys at the box office, while the small screen has been taken over by a gang of antiheroes. From "Scandal" and "Mad Men" to "Breaking Bad" and "House of Cards," the recent slate of leading men aren't as interested in saving the world as they are in saving themselves.
I understand the torture issue that comes to light from time to time, but at the same time one are to look long and hard to find someone able endure that much beating, torture, loss, betrayal, sacrifice and utter destruction like Bauer – and it's all for everyone but himself. It is kind of a dark version of Die Hard.
There is also quite a few both action, thriller etc. films and TV-series out there where the hero uses excessive force against the bad-guys from time to time.
Is Jack Bauer an antihero?