I think model level is more a function of the state of hardware. Once it exists and is available (and if a lab can afford it), then they can train their own 1T, 5T, coming up next 10T model.
Everyones hyped about the branded phone, but it was the chip that mattered and how fast you rushed a product out after you got it.
Sames true now, except size of training run is also a factor.