According to one conservative estimate, he’s 6.1 standard deviations above his expected winrate (of the best players in the game). This is about a 1 in 200 billion chance.

What he’s doing is basically mathematically impossible. Combined with all the other evidence, he is 100% cheating. When he doesn’t have an advantage, he plays dramatically different and does things he never does in the other 90%+ of sessions.