Claude Now Watermarks Everything It Writes — Most Marketers Won't Care
Anthropic has started embedding machine-readable watermarks in all Claude output, first to comply with the EU AI Act. But the mark only proves Claude was "in the pipeline" — paste a draft to fix typos and it carries one; rewrite it and it may vanish. Ahrefs notes Google already ranks AI content fine (5.3% of top pages are fully machine-generated), so the real risk is narrow: passing AI work off as human when you promised otherwise. Switching models won't help — every major provider signed the same code.