AI Experts
Chat with AI experts — Aquinas, Augustine, and the great theologians
Chat with forty-plus AI experts trained on the actual works of the thinker. Every response cites its sources so you can verify, compare, and go deeper.
Why ask an AI expert?
Most believers never get the chance to read Aquinas on grace, Augustine on the will, Chrysostom on almsgiving, or Barth on revelation — not in depth, not against each other. TheoSumma's AI experts are configured on the primary texts so you can ask the great theologians a direct question and receive an answer rooted in the thinker's own vocabulary.
Featured experts
Thomas Aquinas
13th century — Scholastic / Thomist
Augustine of Hippo
4th–5th century — Patristic / Western
John Chrysostom
4th century — Patristic / Eastern
Karl Barth
20th century — Reformed / Dialectical
John Henry Newman
19th century — Catholic / Convert
C.S. Lewis
20th century — Anglican / Apologetics
Hans Urs von Balthasar
20th century — Catholic / Ressourcement
Gregory of Nyssa
4th century — Cappadocian
Plus thirty+ more across patristics, scholasticism, Reformation, modern, and contemporary voices.
How it works
- Pick an expert whose tradition or era fits your question.
- Ask in your own words. Use follow-ups to go deeper.
- Check the citations. Click through to the primary source.
- Compare two experts side-by-side in the Arena feature.
Frequently asked questions
Is this really the theologian talking?
No. It is an AI trained on that theologian's works and configured to respond in their voice. Think of it as an extremely well-read research assistant, not a séance.
Can I use answers for academic citation?
Use the primary sources TheoSumma cites. Never cite the AI itself in academic or pastoral writing.
Which experts represent my tradition?
Filter by tradition — Catholic, Eastern Orthodox, Oriental Orthodox, Reformed, Lutheran, Anglican, Baptist, Methodist, Pentecostal, Evangelical — plus schools like Thomism and Augustinianism. Each has a dedicated Christian AI voice grounded in that tradition's primary sources.
How is this different from ChatGPT or Claude?
General-purpose assistants pull from the open web and frequently hallucinate citations. Each TheoSumma expert is anchored to the primary corpus of a single theologian and cites paragraph by paragraph, so you can verify every claim against the source text.
Are living theologians represented?
Yes — several contemporary voices are included (N.T. Wright, Rowan Williams, Kallistos Ware, David Bentley Hart, Stanley Hauerwas). Living authors are represented using the portion of their published corpus licensed for research use.
Will the Christian AI disagree with me?
Yes, when the theologian would. Aquinas will push back on voluntarism; Barth will resist natural theology; Augustine will challenge Pelagian instincts. The point is to encounter the thinker, not to be flattered.
Can I compare two theologians on one question?
Yes — the Arena feature runs the same question through two experts side by side. Helpful for questions like "How do Aquinas and Barth differ on the knowledge of God?" or "Augustine vs. Pelagius on grace."
Can the Christian AI help me prepare a sermon?
Yes. Ask any expert for a homiletic outline on a passage or topic. Cross-check with another tradition before preaching — and remember citations are suggestions, not sermons.
Does it work in my language?
TheoSumma supports sixteen languages including Arabic, Spanish, French, German, Italian, Mandarin, Hindi, Urdu, Bengali, Persian, Hebrew, Greek, Turkish, Hungarian, and Indonesian.
Is it free?
Yes. The free plan gives you access to every Christian AI expert, with a daily quota. Paid plans raise the quota and unlock the Expert model for research-heavy use.