Can Grammarly Check for AI? Choose the Right Feature

Choose checking rather than editing

Name the action you want before selecting a feature. The following distinctions are editorial descriptions of tasks, not a list of identical buttons in every account.

Grammarly's AI Rewriter is separately documented as identifying phrases associated with AI and suggesting alternatives, including phrases that may also occur in human writing. Its support page describes availability in docs for Pro and Plus subscribers with a gradual rollout (Grammarly AI Rewriter guide). That does not make a suggested replacement an independent verification of authorship.

Treat the distinction as an output check: did you receive an assessment, replacement text or a policy answer? These outputs are not interchangeable. A course rule cannot be inferred from a writing suggestion, and a revised paragraph does not explain what an earlier estimate assessed.

Before starting a check

First confirm that the material is suitable to share and that using the service is permitted in your context. Avoid submitting private interview material, restricted research or another person's writing without the necessary authority. Use the essay-upload privacy checklist to identify questions about processing and retention.

Then check the requirements shown in the actual interface: input length, supported document types, account conditions and what portion of the document will be assessed. This guide does not establish every account's quota or guarantee that all interfaces offer the same report. A page advertised as free is not evidence of unlimited use or identical features across plans.

Keep the draft you intend to assess. An estimate needs to remain associated with that version, rather than being relabelled as a result for later edits. If a file includes tables, references or other material, record what the particular service says it processes; do not assume different tools define eligible text the same way.

Read the result as an estimate

Grammarly's public page presents a percentage estimating text that appears AI-generated and says no detector can conclusively establish whether AI was used (Grammarly's detector explanation). Read the displayed definition, not just the number or colour.

Do not turn a displayed percentage into a claim about the writer's honesty, the time spent writing or whether a course rule was followed. Those are separate questions requiring their own evidence. Turnitin likewise cautions that its AI model can misidentify text and should not be the sole basis for an adverse decision (Turnitin AI Writing Report guidance). This is a limitation statement, not a prediction of either product's result for your draft.

Our AI detection score guide explains why tools' values may describe different things. A result from Grammarly does not reproduce another institution's detector report merely because both use a percentage.

Record what happened, without inventing a test history

This original worksheet is for your own review. It is not a real scan record or a required school form.

If the tool does not return a result, record that outcome rather than describing it as a zero score. If the input changes, record a new version. A change between results for different drafts is not, by itself, a controlled accuracy test.

No scores or product outputs were created for this worksheet. Its purpose is to make the evidence you actually have easier to explain. For organising the drafts themselves, see the version-history guide.

What to do after the check

Choose the next action based on the original problem. For a doubtful reference, verify the source. For confusing wording, review the sentence and its evidence. For a course-policy question, ask about the specific action you used. Grammarly's school guidance tells students to follow their institution's and instructor's rules and acknowledge assistance transparently (Grammarly school-use guidance).

Do not treat repeated rewriting and rescanning as a way to certify authorship or permission. If you choose HumanWords for an allowed writing task, keep its AI estimate separate from its suggested rewrite and review both in context. Our detector versus humanizer guide helps choose the output you actually need. You can use this review process without buying HumanWords or submitting your draft to another service.