  We prove that a general rational smooth Fano threefold admits a toric model.
More precisely, for a general rational smooth Fano threefold $X$, we show the
existence of a boundary divisor $D$ for which $(X,D)\simeq_{\rm cbir}
(\mathbb{P}^3,H_0+H_1+H_2+H_3)$, where the $H_i$'s are the coordinate
hyperplanes. In particular, a general rational smooth Fano threefold has
birational complexity zero. We argue that the three conditions: rationality,
generality, and smoothness are indeed necessary for the theorem.
