ChatGPT Text Watermarking in the EU, Explained
OpenAI is adding an invisible textGrain watermark to ChatGPT and Codex text in the EU. See who is covered and why a detection proves less than you might think.
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How Claude text watermarking works
Anthropic started marking Claude output in August 2026. How the watermark biases token choice, and why a detection result proves less than you think.