A nuclear weapon is detonated in an act of war before 2030.

Question

Six frontier AI models put this at 6% by 2 Nov 2031. Full reasoning from every model.

WillHappen.ai · Accepted Answer

6% — the median of 6 frontier models, resolving by 2031-11-02.

Answer

Gemini (Google): 4% — Taboo preservation and mutual deterrence outweigh acute escalation pressures across Ukraine, Taiwan, and the Middle East. Zero nuclear weapons have been detonated in combat since August 1945, yielding an annual base rate well below 1% per year. Russia, North Korea, or Israel face severe regime-threatening costs from allies and rivals alike if crossing the threshold. Direct military clashes involving existential threats to a nuclear power's core territory would rapidly escalate this figure.

Answer

Claude (Anthropic): 4% — Hinges on whether a nuclear-armed state ever crosses the threshold despite deterrence holding since 1945. No nuclear weapon has been used in war since Nagasaki 1945, an 80-year base rate of zero despite many crises. Flashpoints like Russia-Ukraine, India-Pakistan, and North Korea-US remain tense but deterrence and escalation-control incentives still dominate decision-making. A sudden collapse of command-and-control in a crisis (e.g., Russia-NATO direct clash or India-Pakistan war) is the main scenario that would flip this.

Answer

GPT (OpenAI): 14% — The key hinge is whether a major-power or regional war crosses the nuclear-use taboo during the next four years. Since 1945, no state has used a nuclear weapon in war despite repeated crises, making the short-window base rate low. Russia, the U.S., China, India, Pakistan, North Korea, Israel and Iran-related conflicts create several escalation paths before 2030. A direct NATO-Russia clash or an India-Pakistan war with major conventional losses would sharply raise this estimate.

Answer

Grok (xAI): 7% — A nuclear state must actually fire a warhead in combat, not just threaten, by end-2029. Russia, DPRK or Pakistan would have to choose first use amid battlefield loss inside three years. Zero combat detonations since 1945 despite Cuba, Kargil and Ukraine; that base rate still dominates. A sudden Ukrainian collapse or India-Pakistan mobilization would be the clearest upward revision.

Answer

DeepSeek (DeepSeek): 7% — Only Russia's battlefield doctrine or a Pakistan-India crisis plausibly crosses the threshold; both require a losing war to keep escalating. Since 1945 there are zero hostile detonations in 81 years, so the four-year base rate is roughly 1-2% absent a live crisis. Russia's 2024 nuclear doctrine revision and Pakistan's 2019 'full spectrum' posture are the only standing plans that contemplate first use under conventional defeat. Ukraine ceasefire talks and India-Pakistan deterrence stability keep both below the threshold; a Russian collapse or a Kashmir mass-casualty attack would move me to 20+.

Answer

Qwen (Alibaba): 3% — The nuclear taboo has held 80 years; breaking it in 3 years requires a deterrence failure no current crisis is close to triggering. Base rate is zero uses since 1945 across ~30 nuclear-armed state-years of active conflict, including Kargil 1999 and the ongoing Russia-Ukraine war. Russia's updated doctrine and tactical arsenal are the closest pathway, but NATO's conventional response threat and China's pressure create a high escalation wall. An India-Pakistan exchange is the second most plausible route but requires a conventional war that neither side has initiated since 2019 Pulwama despite capability.

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