As @TinfoilHat0 suggested, you could just call both models as:
model0 = MyModel().to('cuda')
model1 = MyModel()

x0 = torch.randn(1, 1).to('cuda') 
x1 = torch.randn(1, 1)

out0 = model0(x0) # calls asynchronously to CUDA
out1 = model1(x1)