待翻译：Who's doing what with watermarking AI content?

AI 服务暂时不可用，以下为来源正文，待恢复后补全翻译。

Anthropic is bringing SynthID-style text watermarking to Claude, John Gruber has some objections, and James Padolsey has the clearest explanation I’ve seen of how it works. This whole discussion got me wondering what everyone else is doing. Here is where the major AI companies currently stand: