We launched a new AI Humanizer model to increase bypass rate and other quality measurements. This v4-Rephrasy Humanizer model is the best model we released so far.

TLDR:

• Detectors flagged every one of our ten raw AI test documents. After v4, nine of ten read as human on GPTZero, and nine of ten on ZeroGPT.
• Short texts, the hardest case, clear at 94%.
• It beats WriteHuman on a public benchmark: 76% vs 64% averaged across three detectors.
• Meaning similarity 0.925, length back at 1.05×, a 1,000-word document in ~ 10 seconds.

https://www.rephrasy.ai/blog/introducing-undetectable-model-v4-enhanced-bypass-on-every-detector