As of 2026, it is estimated that over 50% of text content on the web is
AI-generated.
Consequently, the cat-and-mouse game between AI Detectors like "Originality.ai" and
"GPTZero", and AI Humanizers designed to bypass them, is intensifying.
This article explores the mechanisms of "AI detection" and the reality of the latest avoidance
technologies that SEO specialists and writers need to know.
🔍 Why does it get caught? (Detection Mechanisms)
| Metric | AI Characteristics | Human Characteristics |
|---|---|---|
| Perplexity | Low (Predictable and orderly) | High (Unpredictable word choices) |
| Burstiness | Constant (Monotonous sentence length/structure) | Irregular (Mix of short and long sentences) |
Ironically, because high-performance models try to write "perfect, beautiful text," smarter AIs are often easier to detect.
🛡️ The Spears: Major Detection Tools
Originality.ai
Features: Known as the world's most "strict" detector. Designed with Google's spam policies in mind, it mercilessly flags "AI: 100%" if it finds even slight AI traces (structural monotony). A barrier for web media operators.
GPTZero
Features: Specialized in anti-cheating. It analyzes the "flow" and complexity of logical structure, looking for human-specific "fluctuations". More cautious about false positives than Originality.ai.
😶🌫️ The Shields: Avoidance Technology "Humanizers"
"Humanizer" tools were developed to deceive detectors. By "rewriting" AI text, they artificially increase Perplexity and Burstiness.
Representative Tools
- Undetectable.ai: Aims for "undetectable" status by intentionally mixing in noise (grammatical breaks) to destroy mechanical patterns.
- StealthGPT: A specialized LLM that outputs in "hard-to-detect patterns" from the generation stage.
⚠️ The Reality of 2026: Quality Degradation
Passing text through these Humanizers lowers detection scores, but often drastically degrades writing quality. Because they forcibly substitute synonyms, the result often looks like "drunken writing" to a native speaker.
🧠 The True Solution: "Sandwich Method"
Automated avoidance tools sacrifice quality. The surest "Proof of Humanity" lies in the process.
🍔 Sandwich Method
- Top (Human): Humans write the outline, unique experiences, and emotional "hooks."
- Middle (AI): Expand and flesh out the body using GPT-5 or Claude Opus 4.6.
- Bottom (Human + AI): A human reads the output, changes conjunctions, inserts personal opinions, and adjusts the nuance of endings.
Text created through this process bypasses detection tools while remaining valuable content for readers.