none of them are 100% accurate, but the ones on Disney's own website are the closest, in our experience.
Do not be mislead by claims of recent updates on allears & wdwinfo...both sites rely on info from volunteers and what they get is not necessarily accurate - that's been demonstrated many times. We have seen allears claim to be updated every month when they're reporting a menu that was replaced a year before...but their source was from Disney dining so they reported it as current. Problem was the person from Disney dining apparently never bothered to confirm that the menu was still correct.
Have also seen errors on Disney's own site...where they haven't got the new menu from the restaurant...so the lesson here is use the menus on the various sites just to get an idea what the types of food might be available & the general prices. Don't plan your whole meal out, lol.