T-44: The T-44 is currently the most common version of the Phantom. The warring Sangheili factions make extensive use of this variant, though the UNSC also captured a large number of these vehicles during combat operations on Requiem.
T-52: Introduced in the last year of the Human-Covenant War, the Type-52 was an improvement over the earlier T-44 in every way. Its sleek silhouette is imprinted in the minds of war survivors from Reach and Earth, making it the most well know of the Phantoms among humans. However, many Covenant forces never had the opportunity to use the T-52 before the loss of High Charity effectively ended its production.
T-57: Combat losses of the T-44 and T-52 have forced the Covenant and Swords of Sanghelios to turn to their allies and independent assembly forges for new dropships. The T-57 is easier to manufacture and maintain without access to high-tier fabrication facilities, at the sacrifice of exoatmospheric performance.