At least one nuclear weapon is detonated in an act of war before 2030.

Question

Six frontier AI models put this at 6% by 9 Oct 2031. Full reasoning from every model.

WillHappen.ai · Accepted Answer

6% — the median of 6 frontier models, resolving by 2031-10-09.

Answer

Gemini (Google): 4% — The taboo survives unless a nuclear power faces imminent regime decapitation or total military collapse. Zero wartime detonations have occurred across 81 years, setting a baseline annual hazard rate well below one percent. Russia, Israel, or North Korea would only strike if conventional defeat directly threatens regime survival, a high bar. Odds rise sharply if NATO directly enters Ukraine or the US and Iran engage in full-scale strikes on atomic facilities.

Answer

Claude (Anthropic): 3% — No nuclear-armed state has detonated a weapon in combat since Nagasaki in 1945, and deterrence logic still holds. Base rate over 80 years of nuclear possession is effectively zero combat detonations outside 1945, even through Cold War, Kashmir, and current Ukraine/Mideast crises. Any use would require a state leader to accept near-certain severe retaliation or total pariah status, a threshold crises like Ukraine or Iran have not approached. Main risk path is India-Pakistan escalation or a collapsing North Korea/Russia scenario, but even acute crises historically resolve below the nuclear threshold.

Answer

GPT (OpenAI): 18% — The key hinge is whether a major conventional war crosses a nuclear-use threshold before deterrence and crisis diplomacy contain it. Since 1945, nuclear weapons have not been used in war despite repeated severe crises, implying a low annual base rate. Russia, the US, China, India, Pakistan, North Korea, or a militant actor would need to authorize and execute use by October 2031. A direct NATO-Russia clash, India-Pakistan escalation, or Korean war would sharply raise this estimate; present conflicts remain below that threshold.

Answer

Grok (xAI): 8% — A nuclear-armed state must choose combat use despite 80 years of non-use and MAD. Russia, Pakistan, DPRK or Israel would have to authorize a warhead by end-2029 after conventional options fail. Post-1945 base rate is zero combat detonations in ~80 years; current flashpoints raise it only modestly. A tactical Russian strike in Ukraine or India-Pakistan escalation would most shift the odds.

Answer

DeepSeek (DeepSeek): 15% — The question turns on whether Putin, or another nuclear-armed leader facing existential battlefield defeat, breaks the 80-year taboo before 2030. Since 1945 only two wartime detonations occurred, both in 1945, implying a ~2.5% annual hazard; the 8-year window to 2030 yields roughly 18-20% baseline. Russia's war in Ukraine and Iran's nuclear program are live vectors, but Putin has not crossed the nuclear threshold despite battlefield setbacks, suggesting the… A single catalytic event, such as a Russian tactical nuclear use in Ukraine or an Iranian breakout test, would flip this from unlikely to near-certain.

Answer

Qwen (Alibaba): 3% — No state has used a nuclear weapon in war since 1945; the institutional and strategic barriers remain enormous. Base rate: zero combat detonations in 80 years despite multiple nuclear-armed rivalries and conventional wars (India-Pakistan 1999, 2019; Russia-Ukraine 2022-present). Russia's nuclear doctrine requires existential threat to the state; Ukraine war has stayed below that threshold for 4+ years, and NATO has deliberately avoided… Pakistan's doctrine is first-use against existential conventional threat, but India's Cold Start has never been executed at scale; a terrorist attack triggering full…

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