Lançar IA de peso aberto em etapas mitigaria riscos

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. Open-weight artificial-intelligence models — those with publicly available parameters — are becoming essential scientific infrastructure (Y. Gal and S. Casper Nature 646, 286–287; 2025). They broaden access, accelerate replication and enable independent testing. But they also pose a risk: once downloaded, parameters can be modified and safeguards removed. This makes it harder to prevent and trace misuse than in monitored, hosted systems. Access Nature and 54 other Nature Portfolio journals Get Nature+, our best-value online-access subscription Subscribe to this journal Receive 51 print issues and online access Rent or buy this article Prices vary by article type Prices may be subject to local taxes which are calculated during checkout Nature 651, 274 (2026) doi: https://doi.org/10.1038/d41586-026-00679-6 The authors declare no competing interests. Customizable AI systems that anyone can adapt bring big opportunities — and even bigger risks ‘Open source’ AI isn’t truly open — here’s how researchers can reclaim the term AI reviewers are here — we are not ready South Korea’s AI framework act focuses on rights and safety Correspondence 03 MAR 26 UN creates new scientific AI advisory panel: what will it do? Laser-written glass tablets can preserve data for millennia News & Views 18 FEB 26 AI agents are ‘aeroplanes for the mind’: five ways to ensure that scientists are responsible pilots This AI can improve your peer review — and make it more polite Pop-up journals for policy research: can temporary titles deliver answers? Nature Index 25 FEB 26 Postdoc research in cell biology, biophysics, X-ray crystallography, cryo-EM, and computational biology, studying cell organization, function, disease Bethesda, Maryland (US) National Cancer Institute, National Institutes of Health Nu Quantum are seeking applications for an AMO Physicist Cambridge, Cambridgeshire (GB) Nu Quantum are seeking applications for a Head of Quantum Hardware Nu Quantum are seeking applications for a Senior AMO Physicist Seeking scientists in pathobiology, immunology, vaccinology, epidemiology, drug discovery, focusing on microbial infections and inflammations. Hangzhou, Zhejiang (CN) Center for Infectious Disease Research, Westlake University Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.