---
title: "Our position on open-weights models"
description: "Anthropic CEO Dario Amodei states that Anthropic has never advocated banning open-weights models, while distinguishing models without dangerous capabilities as a public good from risks associated with sufficiently capable systems. The post identifies two concerns: authoritarian governments gaining military superiority or enabling repression, and powerful models being misused for cyberattacks, biological attacks, or serious alignment problems. It argues open weights can increase misuse risk because guardrails and monitoring are difficult after release, but says banning their use by US businesses would not address bad actors. Instead, Amodei supports restricting powerful chips and chipmaking equipment exports to China, disrupting industrial-scale distillation, and requiring global pre-release safety testing for sufficiently capable open and closed models. He agrees open weights can expand access, competition, and customer control, but says claims about safeguards should be tested empirically."
---

# Our position on open-weights models

[Anthropic](https://yomu.fyi/company/anthropic) · Jul 28, 2026

**Type:** Explainer

## Summary

Anthropic CEO Dario Amodei states that Anthropic has never advocated banning open-weights models, while distinguishing models without dangerous capabilities as a public good from risks associated with sufficiently capable systems. The post identifies two concerns: authoritarian governments gaining military superiority or enabling repression, and powerful models being misused for cyberattacks, biological attacks, or serious alignment problems. It argues open weights can increase misuse risk because guardrails and monitoring are difficult after release, but says banning their use by US businesses would not address bad actors. Instead, Amodei supports restricting powerful chips and chipmaking equipment exports to China, disrupting industrial-scale distillation, and requiring global pre-release safety testing for sufficiently capable open and closed models. He agrees open weights can expand access, competition, and customer control, but says claims about safeguards should be tested empirically.

## Context

The post responds to discussion of possible US restrictions on Chinese open-weights models, an industry letter supporting open weights, and accusations that Anthropic wants a ban to protect its business. It frames the underlying concerns as authoritarian governments gaining military or repression capabilities and powerful models being misused for cyberattacks, biological attacks, or through alignment problems.

## Approach / What changed

The proposed response is to keep powerful chips and chipmaking equipment from China, crack down on industrial-scale distillation operations, and require global pre-release safety testing for all sufficiently capable models, regardless of whether they are open or closed. The post says less capable models, including those from startups and academia, could be exempt from such testing.

## Takeaways

- Open-weights models without dangerous capabilities are described as a public good because they provide value to businesses, developers, and researchers without model costs beyond the compute needed to run them.
- Industrial-scale distillation is described as more compute-efficient than training from scratch, allowing China to build stronger models than its chip supply would ordinarily enable and potentially approach the US frontier within months.
- The proposed safety regime would test sufficiently capable open and closed models for cyber, biological, and alignment risks before release, rather than assuming in advance how open weights affect safety.

**Tags:** [AI](https://yomu.fyi/topic/ai), [AI Governance](https://yomu.fyi/topic/ai-governance), [Model Evaluation](https://yomu.fyi/topic/model-evaluation)

- Source: [Anthropic](https://www.anthropic.com/news/position-open-weights-models)
- Source URL: https://www.anthropic.com/news/position-open-weights-models
- Ingested by Yomu: 2026-09-09T11:36:49.989Z

[Read original post](https://www.anthropic.com/news/position-open-weights-models)