LLM Watermarks Will Be Everywhere Soon. Here's What You Need to Know.
IBM, Tuesday, September 15th, 2026
IBM explains how LLM watermarking works, where it is being mandated, and the limits of current detection schemes.
IBM Think surveys the state of watermarking for large language model output as regulators and platforms move toward provenance requirements.
The article explains the main technical approaches, including statistical token-biasing schemes, and how detectors recover the signal.
It also covers the robustness problem: paraphrasing, translation, and mixed human-AI editing can degrade or strip marks. Readers get a practical view of what watermarks can and cannot prove about content origin.