At present, the most advanced chip process process that can be achieved is 3nm, which Samsung and TSMC have mastered and can be mass-produced, but it has not been put into use, and it is estimated that it can be used soon. Of course, chip performance is not just a few nanometers, depending on many factors, such as transistor density, and the maturity of technology affects the core power consumption of the chip.
Like Samsung's 4nm process, it is obviously not as good as TSMC's 5nm.