Moodle itself has no built-in AI detector. AI detection appears only when an institution installs a plagiarism plugin, so what students see depends entirely on which vendor is enabled.
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How Moodle handles AI detection
Moodle exposes a plagiarism plugin API that vendors implement. When an institution enables a plugin, it appears as a submission-type option on assignments. Students submit a file or pasted text through the normal Moodle assignment flow; the plugin sends the content to the vendor's backend, waits for a report, and displays the AI score alongside the similarity score in the instructor's gradebook view.The plugin pattern means AI detection in Moodle is a toggle, not a default. A course on a Moodle site that has Turnitin enabled globally still shows no AI score unless the instructor picks Turnitin as the plagiarism provider on that specific assignment. Students can ask about a course's setup, or look for the plagiarism vendor logo in the assignment submission pane.
Accuracy in practice
Accuracy tracks the vendor. Turnitin on Moodle performs the same as Turnitin on Canvas or Blackboard, because the Moodle layer is just a pipe. Copyleaks on Moodle matches Copyleaks on Blackboard. Unicheck and PlagScan are slightly less mature on AI detection but still in range on clean AI output.The practical read for a Moodle student: find out which plugin is installed, then read that vendor's accuracy notes. Any institution-specific advice about Moodle AI detection that does not name the plugin is incomplete. All detectors, including every plugin on this list, produce false positives, and non-native English writing gets flagged at higher rates.
What instructors actually see
A flag on Moodle shows up either in the plugin's sidebar on the submission page or in the full vendor report accessible through a link. The AI percentage, flagged sentence highlights, and similarity data all live in the plugin's report, not in Moodle's own gradebook.If you are flagged, screenshot that report before the instructor revises or deletes the submission, and bring it to any conduct meeting. The report is the evidence, and an AI score alone is not proof of anything.
Checking your draft before you submit
For pre-submission checking, the workflow is: draft the paper, identify which plugin the course uses, then run your draft through a free detector to see how it scores. Leap's AI detector scores text 0-100 from writing signals like uniform sentence length, stock AI phrases, hedging words, em-dash density, and repetition, and it highlights the sentences that weigh most.Treat any detector score as a signal, not a verdict. Detectors disagree on edge cases, and a single score from any tool should never be the only basis for an accusation or a decision. If your score looks high and AI assistance is permitted on the assignment, revise the flagged sentences in your own words, vary your sentence lengths, and remove stock phrases. Leap's free humanizer can help with that cleanup pass, though no tool guarantees a result on any specific detector.
The responsible-use note
Defeating AI detection doesn't change the underlying integrity question. If AI help is prohibited on a specific assignment, using a humanizer to pass detection is still a policy violation, just harder to catch. This page exists to help writers understand the tooling, not to encourage misconduct. Know your institution's rules, and disclose AI use where required.If AI assistance is permitted and you just want to verify your final text reads naturally, run it through Leap's free AI detector first. If scores look high, revise the flagged sentences so the text reads as yours.