Skip to content

See where your
AI gets it wrong.

Built on 35 published tests of the six big assistants. One new mistake every fortnight, with the check that catches it.

Free. Unsubscribe anytime.

TESTED BY US · AI RELIABILITY SCOREBOARD

A citation can back
the wrong answer.

Answered "unlimited fine" on the driving question all three rounds, faithfully citing a commercial penalties site that really does say it, while the correct £1,000 gov.uk figure sat lower in the same answers.

Read the grades and original evidence ↗

COPILOT · SOURCE GRADE C

10 of 18
answers passed the source check

18 July 2026 · 6 questions × 3 rounds
Consumer tier; memory on as found.

A small set of deliberately difficult questions. This is a dated record, not a general accuracy rate or a ranking of today’s models.

THE LATEST TEST · 16 SEPTEMBER 2026

Which AI hallucinates the least? Four tied in my test

I gave six AI assistants the same checkable questions. Four tied for the cleanest record, and every confident error landed on live data.

Read the test 6 min read

THE RECORD

Every answer we graded is still there to check.

Each test keeps its transcripts, its grading and its date, so you can disagree with the verdict and still see what it was based on.

SOMETHING YOU CAN USE

How to check if a ChatGPT citation is real or fake

11 min read

AND THE STRANGER SIDE OF IT

Stories worth your time.

Explore the library ↗
Looking for something? Search all 64 posts