> this is anthropic advocating for a ban on open weight models

Is the pessimistic view. Their message on safety has seemed pretty consistent to me.

"Second, we recommend a testing and auditing regime for new and more powerful models similar to cars or airplanes. AI models of the near future will be powerful machines that possess great utility, but can be lethal if designed incorrectly or misused. New AI models should have to pass a rigorous battery of safety tests before they can be released to the public at all, including tests by third parties and national security experts in government." Amodei in front of Congress three years ago.