They used Skylake in late 2016 MBPs and Kaby in the 2017 models.
Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
I haven't seen any erratic crashes yet on code compiled by LLVM 8.1.0 on multiple projects (ROS, Qt5). I hope a microcode fix is pushed by Apple on behalf of Intel soon.