The m2 chip has 5nm.
The M2 processor (chip), which uses TSMC's second-generation 5nm process (TSMC N5P) process, has 20 billion transistors, 4 billion (25%) more than the M1 chip, 5 billion more than the A15 SoC transistors found on the iPhone 13 series phones, and 6.9 billion more than the AMD 6000 series.