Found at “Which AI Models Watermark Their Output? (2026)” on 2026-08-16T16:19:58+02:00.

Several major AI models now watermark their output, but coverage varies widely by provider and by content type. As of August 2026, Claude is the clearest confirmed example of an embedded, machine-readable text watermark applied with no opt-out. Google’s SynthID also watermarks generated text inside Gemini. Most other providers mark images and audio today, and their text-watermarking status is either newer or not publicly confirmed.