The AI Reliability Tracker

Which AI is most accurate?

We ask six AI apps the same questions every month, and mark every answer.

Pilot Thu 1 Oct 2026

Top: Claude (paid: Max), Copilot (free) and Perplexity (paid: Pro), 9 of 9

Bottom: Grok (free), 4 of 9

How the top and bottom are picked

By right answers out of all tries, so a try that came back with nothing counts against the app. Ties share a place. The rows below run A to Z.

The apps ran on different plans, shown beside each name. These questions, this pilot: not a verdict on any app in general.