Some think that it's time for Google to start making its own hardware, the closest we have today is the Nexus series. The Nexus 5X, co-designed by Google and LG, is the mid-range offering and a respite from the 6" Nexus last year, leaving its sibling to fill the premium, large-screen role.
Source: http://www.gsmarena.com/lg_nexus_5x-review-1338.php