  The Parisi formula for the free energy in the Sherrington-Kirkpatrick and
mixed $p$-spin models for even $p\geq2$ was proved in the seminal work of
Michel Talagrand [Ann. of Math. (2) 163 (2006) 221-263]. In this paper we prove
the Parisi formula for general mixed $p$-spin models which also include
$p$-spin interactions for odd $p$. Most of the ideas used in the paper are well
known and can now be combined following a recent proof of the Parisi
ultrametricity conjecture in [Ann. of Math. (2) 177 (2013) 383-393].
