FWIW I read it as just meaning that the AI is very impressive, but might or might not be competitive at the highest levels of play.
Like, if you took a world-class team and had them play against random opponents I'd be surprised if they lost more than one game in a hundred.
In comparison to chess, according to the ELO guidelines where a beginner has an ELO of 800, an average player is ~1500, a professional is ~2200, and only four people have a rating of ~2800, then we'd expect Magnus Carlsen to almost never lose against an average player, and to win around 99% of games against a low tier professional player.
Like, if you took a world-class team and had them play against random opponents I'd be surprised if they lost more than one game in a hundred.
In comparison to chess, according to the ELO guidelines where a beginner has an ELO of 800, an average player is ~1500, a professional is ~2200, and only four people have a rating of ~2800, then we'd expect Magnus Carlsen to almost never lose against an average player, and to win around 99% of games against a low tier professional player.