When was the Gospel of Thomas written?

Those who advocate for first century composition include Funk, Patterson, DeConick, and Valantasis. There are a number of pointers to Thomas having been written in the first century. The honorific titles Jesus enjoys in the Gospel of John are not referenced in Thomas suggesting that the author was unfamiliar with such terminology. Where there are parallels to the Synoptic Gospels then the Thomas version tends to be more succinct and less manufactured. Marvin Meyer contends that collections of sayings like Thomas are a characteristic of first century writing.