Last week, a statement from former White House AI advisor David Sacks stopped Washington cold. "We now have a Chinese open-weight model that is as good as the currently available models from OpenAI and Anthropic," Sacks told a podcast audience, describing Z.ai's GLM-5.2 as comparable to Anthropic's Opus and level with OpenAI's latest offerings. A Chinese startup had, in his telling, matched the tw...