O'Brien is already planning to step Hurry Curry up to 2000m for her next outing in the Group 3 Ethereal Stakes at Caulfield on October 19.
And depending on the filly's performance in that race, Hurry Curry would then press on to the Group 2 Wakeful Stakes (2000m) at Flemington on November 2 and potentially the Crown Oaks (2500m) at Flemington on November 7.
Ridden by Jye Mcneil, Hurry Curry ($3.80) scored by 1-½ lengths from Inevitable Truth ($21) with Our Paramour ($3.60) a short-head away third.
O'Brien said Hurry Curry was always going to be a filly that would appreciate stretching out in trip and enjoyed Sunday's 1800m journey at only her third race start.
"The first time at 1200 metres, was very much an education run and the second start at Bairnsdale she won very convincingly," O'Brien said.
"She was having her third start today and she's probably won quite soft again.
"It's promising signs and she's a filly that will get better again in the autumn, but we'll give her a chance to push on into the spring now.