Short answer. An AI detector estimates whether a text was written by a model. It cannot tell you whether the text is true. To verify an answer you check its claims against sources, and a second or third model helps you find the claims worth checking.
Search for "AI answer verification tool" and you mostly get AI detectors. They answer a different question. This page separates the two jobs so you pick the right tool.
Two questions that sound alike
- "Did an AI write this?" This is detection. It matters for teachers, editors and hiring. The output is a probability about authorship.
- "Is this answer right?" This is verification. It matters when you act on the answer: a dose, a contract clause, a figure in a report. The output is a judgment about each claim.
A true text can be written by an AI. A false text can be written by a human. Authorship tells you nothing about accuracy.
Why detectors cannot verify
A detector looks at the style of the text. It does not look up facts. It will give the same kind of score to a correct paragraph and to a confident invention. Detectors also make mistakes in both directions, so treat any score as a hint, not a verdict.
How to verify an AI answer
- Split the answer into claims. Ask: "List every factual claim in your answer, one per line."
- Mark the risky ones. Numbers, dates, names, quotes, legal or medical statements.
- Ask a second model the same question, independently. Do not paste the first answer in. If the answers differ, the difference shows you where to look.
- Open a primary source for each risky claim. An official page, a filing, a paper, a statute.
- Keep what you verified, drop what you could not.
What a second model can and cannot do
Different models often fail in different places, so disagreement is a useful signal. Agreement is weaker evidence than it looks: in our own test of 2,500 questions, every model gave the same wrong answer in 73 of the 1,221 unanimous cases. Use agreement to move faster, never to skip the source.
Which tool for which job
Related
- How to verify an AI answer against an official source
- Check an AI answer before you trust it
- What to do when ChatGPT, Claude and Gemini disagree
FAQ
Is there a tool that fact-checks AI answers automatically? Tools exist, but each is one more model that can be wrong. Treat the output as a list of things to check. Can an AI detector prove a text is wrong? No. It speaks about authorship only. Should I verify every answer? No. Verify the ones you will act on.