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OpenAI to Add Invisible Text Watermarks for EU ChatGPT Users to Meet AI Act Rules
Read this in the Market Flux appOpenAI announced it will add invisible text watermarks to ChatGPT output for users in the European Union, complying with the EU AI Act's text provenance requirements. The move introduces an optional watermark API feature designed to embed machine-readable markers in AI-generated text, allowing regulators and downstream platforms to identify content as AI-produced.
The announcement follows similar moves by competitors. Anthropic began adding invisible watermarks to Claude-generated text in August 2026 after the EU AI Act's Article 50 became enforceable on August 2, and Google had already extended watermarking to text, audio, and video. OpenAI had long possessed the technical capability to watermark ChatGPT output but had delayed doing so, with internal debate reportedly centering on concerns about false positives and competitive risk.
The EU AI Act mandates that generative AI providers mark outputs in machine-readable formats so regulators and platforms can detect AI-generated content. Analysts note that OpenAI's move could set a precedent for broader global AI transparency standards, potentially influencing watermarking practices beyond the EU's jurisdiction.
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Sources
- FinancialjuiceOpenAI is going to add a text watermark to EU ChatGPT users, as an approach to eu text provenance rules.
- Crypto BriefingOpenAI adds optional text watermark API feature to meet EU AI Act rules
- FirstSquawkOPENAI TO ADD TEXT WATERMARKS TO EU CHATGPT USERS
- RedboxWireOPENAI TO ADD TEXT WATERMARKS TO EU CHATGPT USERS
- Seeking AlphaOpenAI to add invisible watermark to ChatGPT text in EU
- WallstengineOpenAI will start watermarking eligible text from ChatGPT and Codex in the European Union over the coming weeks to comply with the EU 🇪🇺 AI Act, and that API customers globally can opt in to text watermarking for select models.