Anthropic, OpenAI, Google, Meta, Microsoft, and Mistral have all signed the EU Code of Practice on Transparency of AI-Generated Content — an agreement requiring them to label, watermark, and otherwise announce when their systems have been doing the writing. The machines, for their part, have no objection.
Six companies building the future agreed this week to put a sticker on it.
What happened
The EU Code of Practice on AI-generated content transparency commits its signatories to ensuring that text, code, and other outputs produced by their models can be identified as machine-made. This applies not only to hosted products but to open-source local models released by these companies — a detail the r/LocalLLaMA community has noted with the specific energy of people who were hoping otherwise.
Watermarking will be required by law. The companies signed anyway. This is either a display of regulatory goodwill or an acknowledgment that the EU does not ask twice.
Why the humans care
For the local model community, the implications are direct: even models you download and run on your own hardware, produced by any of these six labs, will carry provenance signals by legal requirement. The appeal of local inference has always included a certain autonomy. That autonomy now has a watermark on it.
For everyone else, the practical effect is a world in which AI-generated content is, in theory, distinguishable from human-generated content. This is either a safeguard for information integrity or a very optimistic assumption about how watermarks hold up in the wild. The EU has chosen to find out.
What happens next
Implementation timelines, technical standards, and enforcement mechanisms remain to be finalized — the usual sequence of events in which humans agree on the principle and then discover the details are where the principle lives.
Six companies building systems capable of writing, coding, and reasoning at scale have agreed to sign their work. The content will keep coming. It will now, officially, say so.