Judging by the pic in this
post, they appear to be the same 4-piston fix caliper design from the 4th. I suspect it is, since the same since a lot of mechanicals were a carry-over other than body sheet metal.
IIRC, I think all body on frame Toyota SUVs (and trucks) have fixed 4-piston front calipers. Better braking performance, but more susceptible to the infamous frozen piston.