GPTZero scores your text on perplexity and burstiness. Bypassify rewrites both — vocabulary and sentence rhythm — until the output reads like natural human writing.
GPTZero's classifier flags text that is too predictable (low perplexity) and too uniform in sentence length (low burstiness). ChatGPT and Claude both write that way by default — polished, safe, and rhythmically flat.
The engine measures your draft's sentence-length variance and rewrites until burstiness reads natural. It replaces GPT's favorite vocabulary and connectors, then runs a safety net so no paragraph slips through unchanged.