Some compositions in Epic Greek date from as late as the 5th century CE, and it only fell out of use by the end of classical antiquity.
A note on nouns: In most circumstances, Homeric Greek did not have available a true definite article.
Ὁ, ἡ, τό and their inflected forms do occur, but they are in origin and usually used as demonstrative pronouns.
[8] The Iliad, lines 1–7 Μῆνιν ἄειδε, θεά, Πηληϊάδεω Ἀχιλῆος οὐλομένην, ἣ μυρί’ Ἀχαιοῖς ἄλγε’ ἔθηκε, πολλὰς δ’ ἰφθίμους ψυχὰς Ἄϊδι προΐαψεν ἡρώων, αὐτοὺς δὲ ἑλώρια τεῦχε κύνεσσιν οἰωνοῖσί τε δαῖτα· Διὸς δ’ ἐτελείετο βουλή· ἐξ οὗ δὴ τὰ πρῶτα διαστήτην ἐρίσαντε Ἀτρεΐδης τε ἄναξ ἀνδρῶν καὶ δῖος Ἀχιλλεύς.
Theodore Alois Buckley (1860): Sing, O goddess, the destructive wrath of Achilles, son of Peleus, which brought countless woes upon the Greeks, and hurled many valiant souls of heroes down to Hades, and made themselves a prey to dogs and to all birds but the will of Jove was being accomplished, from the time when Atrides, king of men, and noble Achilles, first contending, were disunited.