Silicon Valley’s largest technology companies are resisting broad restrictions on Chinese open-weight AI models, warning that sweeping controls could reduce competition and leave businesses more dependent on proprietary providers. A July 24 industry letter backed by Nvidia, Microsoft, Meta, IBM, Dell, Palantir, and other organizations urged US policymakers to preserve access to models that can be downloaded and operated independently. Anthropic did not sign, but CEO Dario Amodei said on July 27 that the company opposed a blanket ban and favored targeted controls based on model capability and misuse risk. An open-model fight with higher stakes The open-weight industry letter argues that downloadable models support research, competition, and greater control over data and infrastructure. Nearly 200 US startups have also pushed back against broad restrictions, saying reduced access to inexpensive models could raise development costs and strengthen larger proprietary vendors. Chinese developers are central to the dispute because models from Alibaba, DeepSeek, Moonshot AI, and other laboratories are widely available through public repositories and third-party services. Their lower costs come with governance trade-offs involving hosting, …