Anthropic says it worked with the US National Nuclear Security Administration on a classifier to block concerning chats, like those on building nuclear reactors (Morgan Chalfant/Semafor)

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Morgan Chalfant / Semafor:Anthropic says it worked with the US National Nuclear Security Administration on a classifier to block concerning chats, like those on building nuclear reactors  —  With the government's help, Anthropic built a tool designed to prevent its AI models from being used to make nuclear weapons.