AI writing detector

Where to find it

Check writing signals. A provider AI-likelihood score, a readable summary, and an explanation of the report’s scope.

You can also try AI writing detector.

How it works

1. Choose the exact passage: Paste the text you want checked. If you just rewrote it, use the revised text before starting the check.
2. Request the report: Select Check writing signals and your report appears.
3. Interpret it carefully: Read the score, summary, and limitations together. Use other evidence and your own review.

Access and scope

Try it free, no sign-up needed. Your draft stays put when you switch tools, and each tool keeps its own result.

AI detectors can be wrong. This report cannot prove authorship, copying, or misconduct and should not be the sole basis for an academic or employment decision.

Can an AI detector be wrong?

Yes. AI scores can be wrong. A detector can flag writing a person wrote, and short or highly templated writing may be misclassified. StudySim's score is a probabilistic writing signal, not proof of authorship or misconduct, so review the writing and its context before you draw a conclusion.

Why do AI detectors give different results?

Each detector uses its own model, training data and thresholds, so the same passage can score differently from one tool to the next. StudySim runs the check through a detection service. Treat any single number as one input, not the final word. You can run a passage through the AI writing detector.

Is 20% AI detection bad?

It depends on the tool, because the number means different things. In StudySim the score runs from 0 to 100 and shows how likely the provider is to flag the text as AI-generated. It isn't the share of your text an AI wrote, and StudySim doesn't set a pass or fail line. Read the score with the summary and limitations shown next to it.

How can AI detectors tell if text is AI?

Many detectors look for statistical patterns in wording, such as how predictable each word choice is, and compare them with patterns from human and machine writing. That's why they report a likelihood, not a certainty. StudySim runs the check through a detection service and shows the 0 to 100 score it returns.

Are AI detectors accurate for academic writing?

Use care. Academic writing is often formal and follows set patterns, and templated text can be misclassified. A score shouldn't be the only basis for an academic decision. If you're checking your own work, keep your drafts, and use a similarity checker for a separate question: whether your text matches public web pages.