Fix Turnitin similarity flags before you submit
Identify exactly which sentences trigger high AI similarity scores in Turnitin. Get targeted suggestions to restore natural variation to your writing.
About Turnitin Similarity's AI Detection
Turnitin's similarity checker flags repetitive linguistic patterns common in AI-assisted writing. It measures structural regularity and vocabulary predictability to identify machine-generated content.
GPTypo highlights the specific sentences driving your AI score up and provides human-guided rewrite suggestions so you can fix them before submitting.
What Turnitin Similarity looks for
These are the types of signals that Turnitin Similarity's classifier measures. GPTypo checks for the same patterns.
Sentence uniformity
AI text tends to produce sentences of similar length and rhythm. High variance is a signal of human writing.
Low perplexity
Predictable word choices with few surprises. Human writers are messier and less statistically smooth.
AI vocabulary
Overuse of phrases like "furthermore," "it is important to note," and "multifaceted" that appear far more often in AI output.
Structural repetition
Repeated paragraph openers, parallel sentence structures, and formulaic transitions between ideas.
Missing texture
Human writing has contractions, hedging, asides, and first-person markers. AI text tends to be uniformly polished.
Document coherence
AI text often has a narrow vocabulary range and smooth sentence-to-sentence flow that reads as artificially consistent.