Here's another data point confirming that the OnePlus 5T will launch with Android 7.1 Nougat. GFX Bench, which offers more detailed info than Geekbench, has a bit more to share. For example, the unit tested had 8GB of RAM and 128GB storage - making it the pricier option. Of that, 111GB is available to the user. Since this launches with Nougat and not Oreo, chances are that the internal storage lacks the A/B partitions to be used for seamless OS updates. Anyway, the specs detected by the benchmark line up with expectations - the OnePlus 5T will have a 6" screen with 2,160 x 1,080px...
Source: https://www.gsmarena.com/oneplus_5t_on_gfx_bench-news-28221.php