Research
Building an AI Text Detector From Scratch
The article describes an end‑to‑end DIY project that builds an AI text detector from scratch, including dataset construction, model training, local deployment, and a reinforcement learning verifier (R
The article describes an end‑to‑end DIY project that builds an AI text detector from scratch, including dataset construction, model training, local deployment, and a reinforcement learning verifier (RLVR) component. Inspired by Substack’s newly added AI detector UI, the author shows how to train a small language model to produce text that avoids detection while using the developed checker as a feedback loop. The goal is both educational—demonstrating how detectors work—and practical, exploring limits of spam filtering and enabling writers to polish text without it sounding too AI‑generated.
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Source: Sebastian Raschka | 2026-08-15