Old gold portals = 15 for regular, 15 for hard, 15 for insane, 45 altogether. my farming mech ripped all 3 like wrapping paper.
New gold portal = 50 for regular (better than old portal already, new players can beat it)
60 for hard (my farming mech still beats on autopilot) midrange players get this reward.
120 for insane (minus however many revives you need), had to build/mod my mech and play manually to beat it, adds excitement back into portals and gives big reward to advanced players.
I personally love the shift to a better system of gold portals.