Well, all the articles said that it passed level 50 a couple days ago, but none of them said on how high that is.
Anyway, since the
official height has never been released during construction of the thing,
it's safe to say that it is close, or already gone over, another milestone:
____#14: 1908 The Singer Building NY 612ft (187m) 47 floors
1909: 
#13: 2008 Burj Dubai UAE
623.36ft / 190m 50 Levels
#14: 1908 Singer Building NY
612ft / 187m / 47 floors (Demolished)
#15: 1899 Park Row Building NY
391ft / 119m / 30 floors
#16: 1895 Milwaukee City Hall Wisconsin
353ft / 108m / 9 floors
#17: 1894 Manhattan Life Insurance Building NY
348ft / 106m / 18 floors
#18: 1890 New York World Building
309ft / 94m (Pinnacle 349ft / 106m) / 20 floors
#19: 1891 The Masonic Temple Chicago
302ft / 92 meters / 22 floors
#20: 1889 Auditorium Building Chicago U.S. -Sorry no link. Not in SSP diagram database-
269ft / 82m (Pinnacle 349ft / 106m) Emporis: 73 m / 238 ft / 17 floors
#21: 1876 St Pancras Chambers London UK
269ft / 82m / 6-9 floors
#22: 1868-76 Equitable Life Assurance office Building NY
142ft / 43m / 6-8 floors (Destroyed)