OpenAI adds invisible watermarks to ChatGPT text on EU to comply with AI act
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| Source: Firstpost | Original article
OpenAI will embed invisible watermarks in ChatGPT output for EU users to comply with the AI Act, noting the marks cannot verify authorship, accuracy or liability.
OpenAI announced on 5 October 2026 that it will begin embedding an invisible watermark in text generated by ChatGPT and Codex for users in the European Union. The move is presented as a direct response to the EU AI Act’s provenance requirements, which obligate high‑risk AI systems to make it possible to trace the origin of their outputs. Over the next few weeks the company will roll out the watermark to eligible EU‑based text, while offering an opt‑in watermarking service to API customers worldwide.
OpenAI stresses that the watermark is a technical signal, not a guarantee of authorship, factual correctness or liability. “The technology cannot determine who wrote the content, whether it is accurate or who is responsible for it,” the firm said in its implementation brief. To support independent evaluation, OpenAI is opening applications for access to its watermark detector, initially limited to approved researchers and expert organisations that can help refine the system.
The development matters because it marks the first large‑scale deployment of a provenance tool designed to satisfy European regulation. By making AI‑generated text distinguishable, OpenAI aims to reduce the risk of misinformation and to give regulators a concrete method for auditing compliance. At the same time, the admission of the watermark’s limits highlights ongoing challenges in proving accountability for generative models.
What to watch next includes how effectively the detector can identify watermarked output in real‑world settings, whether the EU regulator will deem the approach sufficient, and if other AI providers will adopt similar measures. OpenAI’s rollout may also prompt broader discussions about extending provenance requirements beyond the EU and about the balance between transparency tools and user privacy.
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