The IsThisAiWritten blog
What AI detectors can and cannot tell you, with sources.
The best free AI detectors in 2026, and what each free tier really includes
The best free AI detectors in 2026, ranked by what each free tier really includes: limits, sign-up, daily caps and what happens to your text.
Best AI detectors, ranked
Which detector to use for which job, and the evidence behind each pick.
How accurate are AI detectors?
What studies and benchmarks show, and how detectors work.
Spotting AI writing
The signs worth checking, and the ones that mislead.
School, work and AI checks
Teachers, Turnitin, Google, and what to do if you are wrongly flagged.
Can teachers detect ChatGPT? What schools use and how well it works
Can teachers detect ChatGPT? What schools actually use, what Turnitin says about its AI indicator, and what independent studies found about accuracy.
Does Google penalize AI content? What Google's own guidance says
Does Google penalize AI content? What Google Search Central says about AI writing, scaled content abuse and E-E-A-T, and how to use AI safely.
Does Turnitin detect AI? What Turnitin says, and what independent tests found
Does Turnitin detect AI? How its AI writing indicator works, the 300-word minimum, the asterisk on low scores, and what independent tests have found.
Wrongly flagged by an AI detector? What to do next
Wrongly flagged by an AI detector? What to do next, how to prove you didn't use AI with version history and drafts, and why false positives happen.
Comparisons and alternatives
Head-to-head pages, sourced and dated, including where the other tool is better.
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