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Our position on open-weights models

Anthropic News 38 sources

Anthropic CEO Dario Amodei clarified that the company does not support banning open-weights models and has never advocated for such bans, contrary to recent accusations. Amodei's primary national security concerns are authoritarian governments building more powerful AI models and misuse of AI for cyberattacks or biological attacks, neither of which would be addressed by restricting open-weights models in the US. Instead, Anthropic supports three targeted measures: restricting chip exports to China, cracking down on industrial-scale distillation operations, and requiring mandatory safety testing for all sufficiently capable models regardless of whether they are open or closed.

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Tuesday, 28 July 2026

Anthropic wants tests, not bans, as OpenAI and Google back open weights

The New Stack 43 minutes ago 38 sources

Anthropic CEO Dario Amodei proposed mandatory safety testing for sufficiently capable AI models before release, rather than bans on open-weight models, as OpenAI and Google backed an open-weights letter signed by 50 companies. The proposal includes three parts: tighter export controls on advanced chips, crackdowns on model distillation, and safety evaluations for models above an undefined capability threshold. The critical unresolved question is who defines the capability threshold and who conducts the tests, since this determination would effectively control release timing for all open-weight model developers.

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