A third world war begins 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): 8% — Nuclear deterrence continues to suppress direct great-power war despite high friction in Taiwan, Ukraine, and the Middle East. Post-1945 base rate for direct conflict between nuclear superpowers over any four-year span is near zero due to MAD. China's PLA aims for military capability by 2027, but a full Taiwan invasion triggering US entry remains a low-probability gamble. A catastrophic escalation from tactical miscalculation or proxy skirmishes into open multi-power warfare is the only credible path.

Answer

Claude (Anthropic): 3% — Requires direct great-power war, which nuclear deterrence and mutual economic ties make extremely unlikely by 2030. No historical precedent since 1945 of direct US-China-Russia military clash despite proxy wars in Ukraine, Taiwan tensions, and Middle East crises. Nuclear deterrence has held for 80 years and all major powers have strong incentives to avoid direct confrontation that could escalate uncontrollably. Watch for a Taiwan Strait incident or NATO-Russia direct clash in Ukraine, either could be the one trigger that shifts this materially upward.

Answer

GPT (OpenAI): 12% — It hinges on whether a regional war pulls U.S., Chinese, or Russian forces into sustained direct combat. Since 1945, even acute nuclear-power crises have usually been contained; a five-year global-war base rate is low. NATO-Russia escalation over Ukraine and a Taiwan blockade/invasion are the clearest pathways, but deterrence still constrains leaders. A Chinese move on Taiwan or direct NATO-Russia fighting that triggers alliance commitments would sharply raise the estimate.

Answer

Grok (xAI): 8% — Nuclear-armed great powers must choose or blunder into direct war despite MAD. US, China or Russia leaders would have to order or accept direct combat by 31 Dec 2029. Taiwan invasion or NATO-Russia clash would first have to jump from proxy/gray-zone to open great-power fighting. Post-1945 3-year great-power war rate is ~0; deterrence and trade keep this far below pre-nuclear base rates.

Answer

DeepSeek (DeepSeek): 4% — Nuclear deterrence has held for 80 years; a great-power war requires someone to accept annihilation, which no leader has done since 1945. The actors who must choose war are Xi, Putin, and the US president; all three have repeatedly backed off direct NATO-Russia or US-China clashes over Ukraine and Taiwan. Base rate: zero great-power wars in 80 years despite Korea, Vietnam, Cuba, and Ukraine, because nuclear second-strike capability makes escalation suicidal. The one development that would change this is a credible battlefield nuclear use by Russia in Ukraine followed by NATO retaliation, which remains a low-probability tail.

Answer

Qwen (Alibaba): 4% — Nuclear deterrence has prevented direct great-power war for 80 years; no structural change has broken that logic yet. Since 1945, zero direct military confrontations between US, Russia/USSR, or China despite multiple near-misses (1962, 1983, 2022-26 Ukraine). Resolution requires multi-power direct combat, not proxy escalation—even a Taiwan scenario would need US and China to choose direct engagement over off-ramps. A NATO-Russia accidental clash or Chinese miscalculation on Taiwan are the most plausible triggers, but each still requires leaders to override nuclear escalation…

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