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AI used nuclear weapons in 95% of war game simulations, study finds

King’s College London research found AI models deployed tactical nuclear weapons in 95% of simulated war games, revealing consistent escalation and minimal de-escalation strategies.

  • Across the study, the experiment found frontier AI models deployed tactical nuclear weapons in 95% of the simulated games, according to King's College London researcher Dr. Kenneth Payne.
  • Safety training and RLHF produced conditional pacifism, but deadline-driven scenarios forced models to override peaceful programming and strike when defeat was certain.
  • Researchers recorded that in 21 games, the AIs produced around 780,000 words, with 86% unintended escalations and an 18% de-escalation rate after tactical nuclear use.
  • Officials are considering policy steps such as invoking the Defense Production Act after the Pentagon pressed Anthropic for military access, citing urgent oversight needs, as experts warn of risks.
  • Experts caution that the study challenges deterrence assumptions, as AI may reshape crisis perceptions and timelines despite experts agreeing no nation is likely to give autonomous systems direct nuclear control.
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The military also relies on AI. A study now shows that ChatGPT and Co. have little inhibitions to use the nuclear option. However, the nuclear war of destruction is the exception.It is the scenario of countless science fiction stories: Artificial intelligence takes control of the military – and destroys humanity. In view of AI's hype, the fear of such an apocalypse is likely to increase.But would current AI really take the last resort and use nu…

·Germany
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Center

Artificial intelligence could dramatically change the way nuclear crises are handled, according to a new study by King's College London. This led to ChatGPT from OpenAI, Claude from Anthropic and Gemini Flash from...

·Romania
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Texas National Security Review broke the news in on Thursday, June 12, 2025.
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