# open-weights

Word from Washington that officials are weighing a ban on US companies using Chinese open weights models. A batch of tech companies signed an open letter backing open weights, and some accused Anthropic of pushing a ban to protect its own business. Dario Amodei denies it, and lays out the three things he actually supports: control the chips, stop industrial-scale distillation, and mandate testing for every model powerful enough to matter. The deepest passage is buried in footnote five — what has kept humanity safe so far may not be the defenders.

Google’s Gemma 4 open-source family comes in four sizes, all with multimodal support, reasoning mode, and 256K context. The flagship 31B uses 2.5× fewer tokens than Qwen3.5 27B but trails it by 3 intelligence points, while the tiny E2B can run on a phone.

NVIDIA releases ~12B Nemotron 3 VoiceChat. Per @ArtificialAnlys, it leads the open-weights Pareto frontier between Conversational Dynamics and Speech Reasoning.

NVIDIA released Nemotron 3 Super, a 120B parameter open-source reasoning model with only 12B active parameters. It combines Mamba and Transformer in a hybrid MoE architecture, scores 36 on the Intelligence Index, and runs at a blistering 484 tok/s.