Among the growing fears about artificial intelligence, one threat has proved particularly alarming: the possibility that A.I. could be used to create a new wave of biological weapons.
In April, biosecurity experts warned that it was disturbingly easy to get advice from chatbots about making pathogens more dangerous. In June, scientists and A.I. executives signed an open letter calling for new controls on the fabrication of DNA because A.I. can now speed up the design of toxins and viruses.
In August, scientists reported that they had used A.I. to build viruses not seen in nature. And on Thursday, Anthropic announced that it had blocked several attempts to use its models by people who might have been trying to weaponize pathogens.
Dario Amodei, the chief executive of Anthropic, followed up with a call on Saturday to slow down the development of A.I., with a set of proposals to keep it safe.
A.I. Queries From Abroad Raise Fears of a Biological Weapons Race
— Emily Turrettini (@textually) September 14, 2026
Today’s chatbots aren’t likely to help lone actors invent a deadly pathogen, experts say. But newer models, trained in biology, may need stronger safeguardshttps://t.co/x3XhW9s4ph
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