Building an AI Text Detector From Scratch

Substack recently launched its AI detector feature in the UI, which is super interesting.Separately, lots of people asked me about interesting local do-it-yourself LLM projects as demos to show what small language models (SLMs) are capable of.Putting one and one together, I thought it would be interesting to show how an AI detector can be implemented. I will also use it as a verifier to train a small language model to produce text that avoids detection. This is a small educational project for studying the limitations of AI detectors and exploring a verifier-based LLM application beyond regular reasoning models trained on math and code.Figure 1: Substack now features a built-in AI detector.So, as mentioned above, the intended goal of this...

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