Apollo and Helios/Sol remained separate beings in literary and mythological texts until the 5th century CE.
ɐpˈɑːloʊ ænd hˈɛlɪˌoʊz slˈæʃ sˈɑːl ɹᵻmˈeɪnd sˈɛpɹət bˈiːɪŋz ɪn lˈɪɾɚɹˌɛɹi ænd mˌɪθəlˈɑːdʒɪkəl tˈɛksts ʌntˈɪl ðə fˈɪfθ sˈɛntʃɚɹi sˌiːˈiː.