  We study non-equilibrium dynamics in SYK models using quantum quench. We
consider models with two, four, and higher fermion interactions ($q=2, 4$, and
higher) and use two different types of quench protocol, which we call step and
bump quenches. We analyse evolution of fermion two-point functions without long
time averaging. We observe that in $q=2$ theory the two-point functions do not
thermalize. We find thermalization in $q=4$ and higher theories without long
time averaging. We calculate two different exponents of which one is equal to
the coupling and the other is proportional to the final temperature. This
result is more robust than thermalization obtained from long time averaging as
proposed by the eigenstate thermalization hypothesis(ETH). Thermalization
achieved without long time averaging is more akin to mixing than ergodicity.
