AI Detector by SpellWeb

SpellWeb's AI Detector has positioned itself as a mission-critical tool for the 2026 content ecosystem, where the line between synthetic and organic text is increasingly blurred. Its architecture utilizes an ensemble of Transformer-based models, including custom-tuned RoBERTa and BERT variants, specifically trained to identify the unique perplexity and burstiness signatures of GPT-4, GPT-5, Gemini 2.0, and Claude 3.5 Sonnet. Unlike basic detectors, SpellWeb employs a Multi-Stage Classification process: first analyzing syntactic structures, then evaluating semantic variance, and finally cross-referencing against a proprietary database of known LLM patterns. This allows it to detect not only raw AI output but also content that has been lightly edited or processed through 'humanizing' tools. The 2026 version features enhanced 'Paraphrase Resistance' and a specialized 'AI-Writer Fingerprinting' capability that can often identify which specific model generated a text block. The platform is built for scale, supporting high-throughput API requests and bulk URL scanning, making it the preferred choice for SEO agencies, digital publishers, and academic institutions requiring high confidence scores and low false-positive rates in high-stakes environments.