[traes]

He's up there for sure, but not clearly the best. According to him both he and Magnus think Alireza Firouzja is the best in longer matches of multiple bullet games.[0] I suspect he would give the edge to Magnus in a shorter match, but I haven't found evidence for this.

[0]: https://www.youtube.com/watch?v=yKXV9-dTq1I&t=2674s