The standard age is 60 for full time and 65 for reserves, but you can apply to extend this another 5 years. This is for all personnel not just aircrew.
However most will end up flying a desk at those years, it’s very unlikely you can be a line pilot for all those years. Your best chance is to be an instructor. There is also a program called specialist aircrew where you forgo rank to keep flying, but this is invitation only and only as long as it suits the ADF.
RAAF holds the record for the oldest fighter pilot in the world.
https://edition.cnn.com/2018/07/19/australia/australia-oldest-fighter-pilot-intl/index.html
Insanely nice guy I had the pleasure of working with.