Wire · regulatory
ChatGPT Watermark Comes to the EU, and OpenAI Has a Detector Ready
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Fusion42 · 6 October 2026 · Fusion42 review
OpenAI is implementing an invisible watermark in ChatGPT and Codex outputs to comply with the EU AI Act's machine-readable labelling requirements, although current detection effectiveness drops significantly with light editing and the detection tool is not publicly available.
This Wire brief sits within Fusion42's coverage of AI & ML, and 5 sources have reported it between 5 Oct 2026 and 6 Oct 2026.
◆ ◆ The Wire takeaway
You must prepare for partial detection gaps as EU regulations mandate AI text watermarking, but current tech fails against lightly edited content. Your compliance system now needs a fallback beyond relying on watermark detection alone.
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5 sources · first reported 5 Oct 2026 · latest 6 Oct 2026
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