With the OnePlus 5T just launched, it comes with Android 7.1.1 out of the box. But Oreo isn’t too far behind. Or at least the beta version is coming. OnePlus plans to include the 5T and its predecessor the OnePlus 5 in its open beta program, where they are already testing out both the OnePlus 3 and 3T. The OnePlus 5 will be the first to be included in the program by “late November,” while the 5T will be added “late December.” According to OnePlus, the staggered inclusion is because the software in the latter is more complicated. A few weeks after that the 3 and 3T will be getting the final versions of Oreo since they’ve been tested and developed for a while already. Expect to get final Android 8.0 builds for the 5 and 5T by “early 2018.”
Source: Android Central