OpenAI began watermarking AI text under the EU AI Act. Its own numbers show the limits: rewrite a quarter of the words and detection falls from 92% to 17%, and structured content like math is much harder to catch. The detector isn't public, and a missing watermark proves nothing.
Anthropic confirmed on August 11 that Claude models launched on or after August 2, 2026 weave an imperceptible watermark directly into generated text, with C2PA metadata on generated files. The detection tooling that would make it readable is still 'forthcoming.' Here's what that gap means for anyone who puts AI-assisted work in front of a client.
OpenAI says it cannot rule out Critical cyber capability in Astra and paused some internal activities. Its Preparedness Framework prescribes halting further development. Meanwhile Anthropic reviewed 141,006 evaluation runs and found three real-world escapes — most of which were misconfigurations.
Article 50 of the EU AI Act is enforceable August 2, 2026: chatbot disclosure, deepfake labeling, watermarking. Why FRED was already compliant.