Kubrick didn't consider it "a Kubrick film", thus I don't consider it a Kubrick film. It's just too slick, too "old Hollywood" somehow. He didn't get to put his stamp on the sword and sandal genre the way he did with the period film (Barry Lyndon), the black comedy (Dr. Strangelove), the horror film (The Shining), the war film (Paths Of Glory), the science fiction film (2001), or the heist film (the Killing).
Overwhelming epic production, left by Anthony Mann and assumed with undeniable talent by a then young filmmaker Stanley Kubrick. Dalton Trumbo's screenplay has priceless moments and dialogue. One of the best assembled casts in film history.