Antonyms of adj error-prone

1 sense of error-prone

Sense 1
erring, error-prone -- (capable of making an error; "all men are error-prone")

INDIRECT (VIA fallible) -> infallible -- (incapable of failure or error; "an infallible antidote"; "an infallible memory"; "the Catholic Church considers the Pope infallible"; "no doctor is infallible")

Similarity of adj error-prone

1 sense of error-prone

Sense 1
erring, error-prone -- (capable of making an error; "all men are error-prone")
       => fallible (vs. infallible) -- (likely to fail or make errors; "everyone is fallible to some degree")