Unfortunately, there aren't publicly available benchmarks for modern technology node sizes, at least not that I'm aware of. Kahng compared on 45nm and 12nm chips, which are very different from a physical design perspective from the 4nm technology node size used by Dimensity 5G, or the sub-10nm technology node size of TPU. "MLContra" used a >100nm technology node size, which is just crazy.

Even if the AlphaChip authors redid Kahng's study properly, this still wouldn't give us useful information -- what matters is AlphaChip's ability to optimize chips in a real-life, production setting, for modern chips, where millions of dollars are on the line.