OpenAI is adding text watermarking in ChatGPT and Codex

OpenAI says its textGrain watermarking “matched or exceeded” other approaches like Google DeepMind’s SynthID for text, which ...
ForkLog

OpenAI to Introduce Text Watermarking in the EU

OpenAI will implement machine-readable text watermarking in the EU to comply with the EU AI Act. Invisible watermarks will ...

AI text is starting to get 'invisible watermarks'—but if you paraphrase 25%, the detection rate drops to 17%

On October 5, 2026, OpenAI quietly announced a major step*1. To meet the requirement of the EU AI Act to 'make generated text ...
NewsBytes

ChatGPT text output now carries invisible watermarks

OpenAI is implementing an invisible, machine-readable watermark in ChatGPT and Codex for EU users, aligning with the EU's AI ...
International Business Times

Claude Is Putting Invisible Watermarks In AI-Generated Text. Even Your Human-Written Copy Could Get One

Files generated through Claude can also contain metadata with digital signatures showing that the content was processed by the AI system. AFP Anthropic is adding invisible, machine-readable watermarks ...
TechRepublic

Claude Now Leaves Machine-Readable Marks on AI-Generated Content

Anthropic now marks supported Claude-generated text and files worldwide, adding invisible watermarks and provenance data under new EU transparency rules. Claude now adds machine-readable marks to ...
DIGITIMES

OpenAI to watermark ChatGPT, Codex text in EU under AI Act

OpenAI will begin adding invisible, machine-readable watermarks to text generated by ChatGPT and Codex in the European Union (EU), as the company moves to comply with the EU AI Act's transparency ...