How it works

Lenz takes a claim — one your product generated, or one you typed — and runs it through a structured pipeline: researched across multiple independent sources, scored for truthfulness, checked for bias, and backed by cited evidence you can audit.

Every claim passes through five steps designed to be thorough, transparent, and impartial — the same pipeline whether you call it from the API or paste a claim yourself. Here’s what happens behind the scenes.

  1. Step 1

    Claim framing

    The claim is received and cleaned up. We strip away emotional language and bias, distill the core factual statement, and prepare targeted search queries — so the rest of the process starts from a neutral, testable hypothesis.

  2. Step 2

    Research

    We search the web in parallel using multiple queries, collecting diverse, high-quality sources. Each source is scored for authority, recency, and relevance — building a balanced research brief.

  3. Step 3

    The arguments

    We use two separate AI models to argue opposing sides in two rounds. First, one builds the strongest case that the claim is true while the other constructs the most compelling argument against it. Then each reads the opponent’s argument and writes a targeted rebuttal, exposing weak points in reasoning or evidence. Both draw exclusively from the collected evidence, ensuring every angle is stress-tested before the conclusion is reached.

  4. Step 4

    Expert review

    Three separate AI models — each evaluating a different axis — independently review the evidence and debate arguments. One audits source reliability and independence, another examines whether the evidence logically supports the claim, and a third checks for missing context or misleading framing. Each scores the claim and explains its reasoning.

  5. Step 5

    The conclusion

    All debates and analyses are synthesized into a single clear conclusion — True, Mostly True, Misleading, or False — with an Lenz Score from 1 to 10. A concise summary explains where the reviewers agreed or disagreed, and surfaces any important bias or logic warnings.

Ask follow-ups

Once a verification is complete, you can ask follow-up questions and get answers grounded in the same evidence — the research brief, debate arguments, and panel scores, plus additional sources pulled in on the fly. Available in your product through the /ask endpoint, or by chatting with Lenz right on any verified claim’s page on the site.

See the API

or try it on a single claim →