R. Ahai (Hebrew: רב אחאי, read as Rav Achai; sometimes recorded as R. Aha, Hebrew: רב אחא, read as Rav Acha) was a Jewish Savora sage of the first generation of the Savora era.
[1] The sages of the Land of Israel said of him: "Give heed to the opinion of R. Ahai for he enlightens the eyes of the exile.
Like the other sages of the Savora era, R. Ahai took part in the editing and redacting of the Babylonian Talmud.
The edits made during this period include added explanations and comments as well as grammatical corrections, and were mostly done anonymously.
Most of the time, he is explaining a difficulty presented in relation to a talmudic passage by sages of a previous generation.