Does Turnitin Clarity's Grammar Check Count as AI? What the Writing Report Shows

Turnitin treats it as an AI feature. Its guide says the grammar suggestions are LLM-generated, and its Trust Center lists the grammar checker among its AI-powered features. The Writing Report does not single it out, though. In Turnitin's words, accepted grammar or spelling suggestions "are not labeled in the Writing Report. They appear as regular writing activity within the playback and timeline." Whether using it counts as AI use on your assignment is for your course rules to say, not the report. And because the report carries no label, any disclosure your course asks for has to come from you.

There are two parts, and they switch on differently.

Spelling is on by default. Suggestions appear as you type, with a red squiggle underline.

Grammar only shows up if your instructor enabled it in the assignment settings. You run it from the first icon in the editor toolbar. The document locks for a moment while a "Reviewing your document" message is shown, then suggestions come back as dark blue underlines. Turnitin says it covers "punctuation, grammar, and mechanics" and that you can run it as many times as you like before the due date.

Clicking the green checkmark on a suggestion swaps in the new wording. Turnitin's student guide puts it plainly: "Approving a suggestion replaces your underlined content with the suggestion in the modal." Dismissing one leaves your text as it was.

Two more details from the same pages. The grammar check is English only; if the assignment is set to another language, the option does not appear in the toolbar. And the suggestions are not fixed rules: "Because grammar suggestions are LLM-generated and based on the current content of the student's draft, suggestions may differ each time the student runs a check." So if a second run flags different things, that is how the tool works, not necessarily a sign that your first round of fixes was wrong.

Turnitin's Trust Center describes the checker's purpose as "to provide grammar feedback to students without modifying the original meaning of the text." That is the design goal. The checkmark is still yours to click, so read the suggestion first, especially in a sentence where one word carries your argument.

The guide's sentence about the Writing Report covers the toolbar check only. Clarity has other places where you could fix a sentence, and each one leaves a different record:

None of the chat rows should come as a surprise: Turnitin says a banner in the AI Chat tab tells students that instructors get their entire chat history on submission. As for the last row, Turnitin's instructor FAQ asks instructors to remind students that "all writing, revision, and editing must be completed within the writing space."

"Not labeled" cuts both ways. Nothing in the report points at those edits as AI. Nothing in it shows they came from the checker, either. In the playback they appear the same way as the rest of your writing activity, so if you ever need to say "those changes were the grammar check", the report alone will not say it for you.

For everything else Clarity records, from paste findings to the five flags, see what Turnitin Clarity records about how you wrote your paper.

Turnitin's Clarity pages do not say.

Here is what they do say. AI writing detection only appears in Clarity if your institution licenses Turnitin Originality and has detection switched on. When it does, pasted text cards show AI results "when a pasted block of 300+ words is likely written or altered by AI", and the full results for the submission sit in a separate AI Writing tab. The 300-word rule is about pasted blocks, and accepted grammar suggestions are described as regular writing activity. What none of the fifteen Clarity and Writing Report pages we read explains is how the AI Writing tab, which looks at the whole submission, treats text that came from accepted suggestions.

The nearest statement we found is a general answer in Turnitin's AI detection FAQ. Based on its tests on human-written documents, "in most cases, changes made by Grammarly (free & premium) and/or other grammar-checking tools were not flagged as AI-written by our detector." That answer does not name Clarity's own checker, and "in most cases" is a real qualifier. We go through the rest of that paragraph, including what it excludes, in does Turnitin detect Grammarly as AI writing.

The report's silence is about how the record is drawn. It says nothing about what your course permits.

Turnitin's student FAQ includes its own tools in its advice on AI use. "Anytime you want to use AI tools for an assignment, including Turnitin's, we recommend that you" review your institution's AI policy, course syllabus and assignment instructions, speak directly with your instructor, "Always cite AI tools if you use them", and make sure most of the work stays your own thinking.

There is one useful signal in the toolbar itself. Grammar suggestions only appear when your instructor turned them on for this assignment. That tells you the check is available to you. It does not tell you whether your course expects you to mention it.

1. Look for the words "grammar" or "proofreading" in your course's AI policy and the assignment instructions. Yours may name them, or may say nothing at all.
2. If it is unclear, ask one specific question. Something like: "The grammar check in the Clarity toolbar is switched on for this assignment. Do I need to mention it if I use it?" A vague "can I use AI?" gets a vague answer.
3. If your course wants AI use disclosed, write the line yourself. One sentence is enough, for example: "I used the spelling and grammar check built into Turnitin Clarity." The Writing Report will not add it for you.
4. Fix things inside the writing space. Copying a paragraph out to another app and pasting the corrected version back creates a paste finding for text you wrote yourself.
5. Read each suggestion before you accept it. It replaces your wording, and running the check again can give you different suggestions.

Can my instructor tell which grammar suggestions I accepted? Not from a label. Turnitin says accepted suggestions are not labeled in the Writing Report and appear as regular writing activity in the playback and timeline. The change itself is part of the playback; what is missing is any marker saying it came from the checker.

Does the same apply to the spelling check? Yes. Turnitin's sentence covers suggestions "accepted from the grammar or spelling check".

What about the citation check? The guide does not say. Its sentence about the Writing Report names the grammar and spelling check only. If it matters for your assignment, ask your instructor rather than assuming it works the same way.

Is AI writing detection even switched on in Clarity? Only if your institution licenses Turnitin Originality and has detection enabled. Two of Turnitin's Clarity pages disagree on languages: the AI tools guide lists English, Arabic, Spanish and Japanese, while the instructor FAQ lists English, Japanese and Spanish. Both were edited on 1 October 2026. The grammar check itself is English only.

Can I see my own Writing Report to check? Only if your instructor allows it. Turnitin's instructor guide says students "will only see the Writing Report if you select Allow students to view Writing Reports when creating the assignment". The student guide adds that access comes after the due date.

• Turnitin, AI Tools with Turnitin Clarity, edited 1 October 2026; read 2 October 2026.
• Turnitin, Writing in Turnitin Clarity (student guide); read 2 October 2026.
• Turnitin, Reviewing the Writing Report; read 2 October 2026.
• Turnitin, Introduction to Turnitin Clarity's Writing Report and Getting Started with Turnitin Clarity for Students; read 2 October 2026.
• Turnitin, Using Turnitin Clarity's AI Assistant; read 2 October 2026.
• Turnitin, FAQs for students using Turnitin Clarity and FAQs for Instructors Using Turnitin Clarity; read 2 October 2026.
• Turnitin, Turnitin's AI writing detection capabilities FAQs; read 2 October 2026.
• Turnitin, Trust Center, AI features table last updated 23 September 2026; read 2 October 2026.