"But I don't agree with the letter's assertions that open-weights models necessarily make it easier to develop safeguards or that broad access to capabilities necessarily helps defenders more than attackers. "To summarize my and Anthropic's position, we have not and are not advocating for a ban on open-weights models as a category. We should instead focus on keeping powerful chips out of authoritarian hands, stopping industrial-scale distillation, and requiring safety testing of all sufficiently capable models, open and closed," Amodei wrote. We can get the best performance in the world with a totally American company, using American open-weight companies and American GPUs. We don't have to hide behind some kind of fake thing," Karp said.