AI Detector by TextExtend

AI Detector by TextExtend utilizes a sophisticated ensemble of Transformer-based models and statistical linguistic analyzers to identify content generated by LLMs including GPT-4o, Claude 3.5, Gemini 1.5, and Llama 3. As of 2026, the tool has evolved beyond simple probability scoring to incorporate 'Semantic Jitter' analysis and 'Burstiness' metrics, which effectively flag text even after passing through advanced 'AI Humanizers'. The architecture relies on multi-stage processing: first, a Perplexity and Burstiness assessment; second, a pattern-matching stage against known model-specific linguistic footprints; and third, a contextual coherence check. This three-tier approach allows for high precision while maintaining a low false-positive rate. In the current market, TextExtend distinguishes itself through its granular sentence-level breakdown, providing users with a heatmap of AI influence rather than a binary score. This makes it an essential tool for digital publishers, educational institutions, and legal firms who require verifiable proof of authorship. The platform’s 2026 update includes deep integration with watermarking standards proposed by the C2PA, allowing it to detect not just raw AI text, but also content modified by automated rewriting tools.