The OnePlus 8 and OnePlus 8 Pro are the newest Android flagships to support Google's game streaming service. The partnership between OnePlus and Google was announced during the OnePlus 8 launch, but a new forum post sheds a bit more light on Google Stadia support. For one, the new phones get access to Stadia right away. You can even give the free Stadia tier a whirl, which only requires you to have a Gmail account to sign up.
OnePlus is also bringing the service to a "selection of other OnePlus devices." It hasn't elaborated yet which devices will get the support, but it's something we're sure to hear about from the company soon.