Google is expected to bring Google Assistant on other smartphones and it seems that there's a way to already enable it even if you don't have a Pixel smartphone. According to a source, you can now enable Google Assistant on a Nexus 6P smartphone, but you apparently, shouldn't rush to do so. It seems like the alpha edition of the app was released by mistake. Users are reporting that it is very buggy and even gets stuck in certain screens. This is by no means an official roll-out, though it does look promising for those with older Android phones.
Google V6.13 Alpha
The new Google app supports payments and delivery information to be used in conjunction with Google Assistant. It also comes with a recent search page and lite mode that can be disabled under account settings. Moreover, The teardown also claims that Google might be bringing more advanced offline search features for downloading the first few page results if you experience connectivity problems.
Google Assistant can be enabled by holding the home button. Still, the alpha version might be a proof that Google will bring it's AI virtual assistant to non-Pixel smartphones sooner than we expect, though it could also mean that the feature was incorporated for testing purposes. In addition, testers have managed to get the Assistant working on a Nexus 6P as well as a Samsung devices but still, there are plenty of phones where it is not working yet. Furthermore, we might be able to hear more from Google on the spread of Assistant during Mobile World Congress at the end of the month, however, it's more likely that Google will release more details at Google I/O, which gets underway on May 17.