The prodigy story is almost too good, which is part of what made jazz insiders a little skeptical at first. A self-taught kid from Indonesia who discovered jazz through his father's record collection, started playing at six, and by thirteen was performing at the Village Vanguard? It sounds like a publicist made it up. But the playing held up under scrutiny, and serious musicians including Wynton Marsalis vouched for him early, which counts for something in this world.

What Alexander actually sounds like at the piano is this: clean, unhurried, and remarkably logical in his improvisations. He has absorbed the post-bop vocabulary deeply — you can hear Thelonious Monk and Herbie Hancock in his phrasing — but he does not sound like he is quoting them. The lines he constructs have their own internal sense of direction. He is not a flashy player in the sense of running up and down the keyboard to impress anyone. When he plays a ballad, he means it. When he swings, it is a real groove, not a demonstration.

His debut album My Favorite Things (2015), recorded when he was eleven, could have been a novelty record. It was not. The Coltrane standard on that record is played with a patience and melodic intelligence that most pianists twice his age would not manage. Countdown (2016) showed he could dig into harder material, and by Warna (2018) he was starting to work in his Indonesian roots more deliberately — not in a fusion-gimmick way, but as a genuine layer of musical identity. That record is probably his most interesting to date because it sounds like someone figuring out who they actually are, not just proving they can play.

The critical conversation around him has always had to reckon with the age question, which is both fair and a little unfair. Yes, context matters — hearing a twelve-year-old play at this level is a different experience than hearing a thirty-five-year-old do the same thing. But Alexander is in his early twenties now, and the music has kept developing. The technique was always there. What is getting more interesting is his compositional voice and his willingness to sit inside a moment rather than fill every measure with something impressive.

If you are playing his records for a friend who has never heard him, start with the ballads. That is where you hear the actual musicianship most clearly, stripped of any novelty factor. Then put on something up-tempo and watch them recalibrate. He is a pianist worth following not because of where he came from but because of where he seems to be going.