LOAN MATHS
Extra $300 a month on a $400k mortgage: an AI's maths, checked
GPT-5.4 Nano said the extra payments save about $79,000 and 5.5 years. Both reviewers found the real figures: about $149,600 and 7 years 7 months.
Read the check- ChatRound
- Examples
EXAMPLE CHECKS
Example check reports
Each example is a real ChatRound check: one AI's answer to a question where a mistake costs something, gone through by two AIs from other companies. The report quotes each wrong claim, says what is right, lists what was missed and gives a corrected answer. We read every report, and checked it against a primary source, before publishing it.
TAX
Sold at a loss, bought back 16 days later: the wash-sale rule, checked
Claude Haiku 4.5 said the $5,000 loss can't be deducted this year. The reviewers agreed, and added two cases where the loss is lost for good or triggered by someone else.
Read the checkTRAVEL RULES
Back to Europe after 70 days? The 90/180 rule, checked
Claude Haiku 4.5 told a US citizen they could stay May 1–June 30 after 70 days in Spain. The check found the stay has to end on May 20.
Read the checkMEDICATION
Does amoxicillin stop the pill working? An AI answer, checked
GPT-5.4 Nano said you don't need backup contraception on amoxicillin. Two other AIs checked it: the answer holds, with two things it left out.
Read the checkCODE
Top 3 salaries per department, ties included: an AI's SQL, checked
Gemini 2.5 Flash-Lite wrote a DENSE_RANK() query. Two reviewers went through it: it is correct, with caveats about NULL salaries and database versions.
Read the checkHow these were made
On October 27, 2026 we asked each question in its own language. The answers come from each company's cheapest current model (GPT-5.4 Nano, Claude Haiku 4.5, and Gemini 2.5 Flash-Lite) through its API, without web search, so none is from anyone's conversation. Each went through ChatRound's real review pipeline. Of the 42 reports we read, 14 were not published: a reviewer or the report itself was wrong, or it added something we could not confirm.
SHARED BY THEIR OWNERS
Public conversations
Conversations people made public and allowed search engines to index. Several AIs answered the same question.
YOUR TURN
Check the answer you're about to rely on.
Paste an answer from ChatGPT, Claude, Gemini or any AI. Two AIs from other companies go through it and show you what's wrong.
It puts a Check button under every ChatGPT, Claude and Gemini answer.