# US Senate negotiators debate an AI 'duty of care' bill that could block unsafe models

> Senate negotiators are debating legislation that would impose a legal duty of care on AI companies and, more strikingly, give the government power to block the release of models judged to be unsafe, according to Reuters. It would mark a significant shift from the largely hands-off posture US lawmakers have taken toward frontier AI. A duty of care would obligate developers to take reasonable steps to prevent foreseeable harm, a standard already familiar in other safety-critical industries. The pre-release blocking power is the more contentious piece, effectively creating a gatekeeper for the most capable systems and raising immediate questions about who decides what counts as unsafe. The talks are early and any bill faces a hard road, but the fact that a duty of care and pre-release review are on the table at all reflects how much the mood in Washington has shifted amid a steady drumbeat of warnings from AI insiders. If it advances, it would rank among the most aggressive AI safety mandates yet proposed in the US.

_Section: [Daily AI Updates](https://www.wortins.com/daily-ai) · Source: Reuters · Published Saturday, September 12, 2026_

## Wortins' read

Senate negotiators are debating legislation that would impose a legal duty of care on AI companies and, more strikingly, give the government power to block the release of models judged to be unsafe, according to Reuters. It would mark a significant shift from the largely hands-off posture US lawmakers have taken toward frontier AI. A duty of care would obligate developers to take reasonable steps to prevent foreseeable harm, a standard already familiar in other safety-critical industries. The pre-release blocking power is the more contentious piece, effectively creating a gatekeeper for the most capable systems and raising immediate questions about who decides what counts as unsafe. The talks are early and any bill faces a hard road, but the fact that a duty of care and pre-release review are on the table at all reflects how much the mood in Washington has shifted amid a steady drumbeat of warnings from AI insiders. If it advances, it would rank among the most aggressive AI safety mandates yet proposed in the US.

## Source

[Read the full story at Reuters](https://www.techmeme.com/260911/p31#a260911p31)

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