Mark 1:1, is “the Son of God” original?
Mark 1:1 has both an opening with “the Son of God” and a shorter opening ending at Jesus Christ; whether the title originally belonged remains disputed. The APB prints the shorter opening.
The APB text at this verse
The manuscripts, editions, and versions
The committee record at this verse
The APB is translated by a committee of language models that works blind. The translators are never told they are translating the Bible, never given a book name or a verse number, and never shown the witnesses listed above. Where the manuscripts disagree, the choice between readings is made before translation by the same kind of translator working the same way: it sees the competing readings and the witnesses by age and class, but never a reference or a manuscript name. There are 14,877 such places. For APB 4.0 every one was decided again in October 2026. GPT-6.1 Sol decided every one first. Claude Fable 5.1, from another model family, decided 2,483 of them second, including every place where the first translator left the base text. A departure from the base text needs both translators to agree and the first to be at least 0.8 confident. There is no third translator, so the base text stands when the two disagree. APB 4.0 is translated over those decisions. Whatever was done at this verse was done on the language and the evidence alone, and the record is public.
“The base text reads χριστοῦ. The copies also carry χριστοῦ υἱοῦ θεοῦ [greek majuscule; greek manuscript; early greek manuscript tradition], υἱοῦ τοῦ θεοῦ [greek majuscule; greek manuscript; later majority tradition]; the committee kept the base text. The external weight leans to the longer wording, while copyist habit favors the shorter.”
“The base text reads υἱοῦ τοῦ θεοῦ·. The copies also carry υἱοῦ θεοῦ· [greek majuscule; greek manuscript; early greek manuscript tradition], the omission [greek manuscript; early greek manuscript tradition]; the committee kept the base text. Both readers preferred the other wording, but the first reader's confidence was under the committee's floor of 0.8, so the base text stands.”
The committee retained the short opening in the decision reflected by the APB's printed text: "The beginning of the gospel of Jesus Christ." GPT-6.1 Sol (OpenAI) served as the first translator; Claude Fable 5.1 (Anthropic) served as the second translator. The textual note says: "The external weight leans to the longer wording, while copyist habit favors the shorter." A second textual note identifies the fuller wording with the article as its base and also says "the committee kept the base text." These notes conflict about the retained wording. The published translation shows the short opening; the two notes do not provide a consistent account of that decision.
The argument for each reading
If “Son of God” belongs
The longer opening has support from Nestle-Aland 28 and the Robinson-Pierpont Byzantine Textform. Both include the title Son of God, though Robinson-Pierpont includes the article. Nestle-Aland 28 places the phrase in brackets in some printings, so its inclusion can also carry a visible signal of uncertainty.
The APB's textual note gives this reading a substantive argument: "The external weight leans to the longer wording, while copyist habit favors the shorter." That assessment recognizes support for inclusion even though the APB prints the shorter opening. With the phrase included, Mark 1:1 identifies Jesus as Son of God directly in its opening line.
If the short opening is original
The shorter opening appears in Westcott-Hort and in the original hand of Codex Sinaiticus. It ends with Jesus Christ. A corrector added the title to Codex Sinaiticus, so that manuscript preserves both the initial absence of the phrase and a subsequent addition.
The APB's textual note says that copyist habit favors the shorter wording, while acknowledging that external weight leans toward the longer wording. It does not explain the particular copying process behind that assessment. The shorter reading therefore has both manuscript and editorial support, alongside a stated argument about copying. Its effect is specific: the opening names Jesus Christ without adding Son of God.
The witnesses preserve a real difference, and the APB's two textual notes leave an unresolved conflict about which base wording the committee retained. The printed translation is unambiguous about its own choice. The uncertainty concerns whether the opening included Son of God. Both readings name Jesus Christ, and omission of the title from this sentence does not itself deny the title.
Related entries
Witness readings for critical editions are quoted from the SBLGNT apparatus (CC BY 4.0); Hebrew text from the Westminster Leningrad Codex (Open Scriptures Hebrew Bible). Readings of ancient manuscripts and versions are cited from the sources linked above.