AI-generated text exhibits measurable statistical patterns that differ from human writing. Our tool analyzes your text across several key dimensions:
- Sentence Length Uniformity: AI models produce sentences of remarkably similar length. Human writers naturally vary between short, punchy sentences and longer, complex ones.
- Vocabulary Diversity: AI tends to reuse the same words more frequently. Humans draw from a broader and more unpredictable vocabulary.
- Burstiness: Human writing alternates between simple and complex passages. AI maintains a more constant level of complexity throughout.
- AI-Characteristic Phrases: Language models disproportionately favor certain phrases like “it is important to note,” “delve,” or “multifaceted.” We check for over 60 known AI-favored expressions.
- Transition Word Frequency: AI overuses sentence-starting transitions like “Furthermore,” “Moreover,” and “Additionally.”
- Paragraph Uniformity: AI writes paragraphs of similar length, while humans produce more varied paragraph structures.
- Passive Voice Usage: In academic contexts, AI relies more heavily on passive constructions than human writers typically do.
Each factor is scored from 0 to 100 and weighted to produce an overall AI probability score. This is a heuristic analysis — no AI detector is 100% accurate, but understanding these patterns helps you improve your writing.