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Policy2026-08-02 · source-backed
Willison's August 2 roundup lays out "Open Weights and American AI Leadership" (July 24, Microsoft-shepherded, now 235 signatory companies including NVIDIA, Amazon, Y Combinator, the Linux Foundation, and OpenAI after initially abstaining); Anthropic's separate July 27 rebuttal from Dario Amodei; and "Pacing the Frontier" (July 28), which Amodei and Jack Clark did sign. The open-weights letter grew from ~25 signatories to 50 within a day to 235 by August 2, and explicitly endorses distillation as "a widely used technique for model improvement"; the exact practice Amodei wants cracked down on at "industrial scale." Practical read: no US ban on open-weight models is coming, but a compute-threshold safety-testing regime applying to open and closed models alike now has backing from the one lab that stayed off the coalition letter.
Each link below shares sources, entities, or timing with this story.
Jack Clark works at Anthropic / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Jack Clark works at Anthropic); both cover American AI Leadership, Anthropic, Combinator, July; overlapping topics (american, anthropic, closed, model).
Linked by a graph relationship (Jack Clark works at Anthropic); both cover Amazon, American AI Leadership, Anthropic, July; overlapping topics (amazon, american, anthropic).
Linked by a graph relationship (Jack Clark works at Anthropic); both cover Anthropic, Frontier, Jack Clark, July; overlapping topics (anthropic, clark).
Linked by a graph relationship (Jack Clark works at Anthropic); both cover Amodei, Anthropic, July, Microsoft; overlapping topics (amodei, anthropic, closed).
Jack Clark works at Anthropic / Shared entities / Same source domain / Shared topic / Earlier coverage / Tension
Linked by a graph relationship (Jack Clark works at Anthropic); both cover Anthropic, July, OpenAI, Willison; reported by the same outlet (simonwillison.net).
Jack Clark works at Anthropic / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Jack Clark works at Anthropic); both cover Anthropic, Linux Foundation, Microsoft, NVIDIA; overlapping topics (anthropic, model).
Jack Clark works at Anthropic / Shared entities / Earlier coverage / Tension
Linked by a graph relationship (Jack Clark works at Anthropic); both cover Anthropic, Linux Foundation, Microsoft, NVIDIA; earlier Anthropic coverage from 2026-06-27.
Jack Clark works at Anthropic / Shared entities / Same source domain / Earlier coverage / Tension
Linked by a graph relationship (Jack Clark works at Anthropic); both cover Anthropic, July, Microsoft, OpenAI; reported by the same outlet (simonwillison.net).