Key points
- Early detectors (2022-2023) relied heavily on basic perplexity scoring alone.
- 2024-2025 saw detectors add sentence-structure and burstiness analysis to reduce false positives.
- 2026 detectors increasingly incorporate watermarking signals from model providers alongside statistical analysis.
AI detection emerged rapidly after ChatGPT's late-2022 public release, evolving from simple statistical checks to today's more sophisticated multi-signal models.
What this means for you
Early detectors (2022-2023) relied heavily on basic perplexity scoring alone. Understanding this distinction is the foundation for evaluating any specific tool's marketing claims — see our full humanizer comparison table for how individual tools stack up.
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