Translation:

> Anthropic has never advocated for a ban on open-weights models.

"We don't want a total ban on ALL open-weights models" (Anthropic never released a single open weight model)

> All sufficiently capable models, open and closed, should go through mandatory safety testing.

"We want tight regulations on highly powerful open or closed weight models that should go through mandatory safety testing that we outline which makes them safe to use."

This is still a form of a ban that he wants to define. But the rest of his concerns such as stopping distillation attacks and not selling chips to China all do NOT work.