This is a special post for quick takes by sam. Only they can create top-level comments. Comments here also appear on the Quick Takes page and All Posts page.
This is perhaps stating the obvious, but Claude Mythos is the first model where I think an open-weights model of the same capability level would be potentially catastrophic. This feels like a notable turning point.
States should probably have a plan for this level of capability being available to anyone on earth without safeguards for several hundred dollars within 12-24 months