AI Detector for Essays

How essay AI detection works

The checker splits your essay into passages and asks the Pangram Labs detector to label each one as AI-Generated, AI-Assisted or Human Written, with a High, Medium or Low confidence level. We then add the labels up into a short summary and highlight the passages sentence by sentence, so you can see where a result comes from.

The detector returns labels, not explanations. It tells you which passages look AI-like; it does not tell you why. For a plain-language overview of what detectors look for in general, read how AI detection works.

What the result means

You get a verdict (Mostly human-like, Mixed signals, Likely AI-assisted, or Not enough text), a confidence level and a figure labeled “Flagged as AI-like.” That figure is the share of the essay made up of passages labeled AI-like. It is a proportion of the text, not the probability that the whole essay was written by AI.

• Mostly human-like: few or no passages were labeled AI-like.
• Mixed signals: some passages were flagged and others were not. This is the result that most needs a human read.
• Likely AI-assisted: a large share of the essay was labeled AI-like.
• Not enough text: the essay is under 50 words, so there is nothing reliable to report.

Can AI essay detectors be wrong?

Yes, in both directions. A detector can flag writing that a person produced and miss writing that a model produced. Some kinds of essays are more likely to be misread:

• Short essays and short excerpts, which give the detector little evidence.
• Heavily edited or polished writing, including text run through grammar tools.
• Translated text and essays by non-native English writers.
• Formal, formulaic writing such as lab reports or standard five-paragraph structures.

We do not publish accuracy figures we have not measured ourselves. The accuracy page explains what we can and cannot claim, and the methodology page covers what each part of a result represents.

AI-assisted vs fully AI-generated writing

Not all AI involvement looks the same. A student might have asked a chatbot for an outline and written every sentence themselves, or pasted a generated draft and changed a few words, or written the essay alone and asked a tool to fix the grammar. Those are different situations, and a single label cannot tell them apart.

The AI-Assisted label exists because writing is often a mix. When an essay shows both Human Written and AI-like passages, the useful question is which parts, and whether that matches what the writer says they did. Whether any AI use is acceptable depends on the rules of the course, publication or workplace, not on the detector.

Tips for reviewing flagged passages

1. Read the highlighted sentences in context, not as isolated lines. A flagged sentence inside a plainly personal paragraph tells you less than a flagged run of several paragraphs.
2. Look at confidence. A Low-confidence flag is a weak signal; a High-confidence flag across a long stretch is a stronger one.
3. Compare the flagged passages with the writer’s other work, if you have it. Sudden shifts in vocabulary, structure or specificity are worth noting.
4. Check for facts, sources and examples. Writing that cannot point to anything specific is worth a conversation, whoever wrote it.
5. Ask about the process. Notes, outlines, drafts and version history say more than any detector output.
6. Check a second, different excerpt of the same essay. If the result changes a lot between sections, treat it as unsettled.

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