The NBER declares a US recession beginning before the end of 2027.

Question

Six frontier AI models put this at 30% by 17 Oct 2029. Full reasoning from every model.

WillHappen.ai · Accepted Answer

30% — the median of 6 frontier models, resolving by 2029-10-17.

Answer

Gemini (Google): 27% — Recession hinges on delayed tightening impacts or labor market cracks emerging over the narrow 14-month window through 2027. Unconditional baseline probability of entering an NBER-defined contraction across any 14-month stretch is roughly 18-22%. NBER's Business Cycle Dating Committee typically requires 6-12 months of lag, which the late 2029 resolution comfortably covers. A sharp spike in U-3 unemployment above 5.0% by mid-2027 would decisively push odds above 60%.

Answer

Claude (Anthropic): 38% — Hinges on whether tariff/rate-driven slowdown or credit stress tips into a full NBER-dated contraction by 2027. NBER recessions occur roughly every 6-10 years historically, and current cycle (last recession 2020) is aging into a plausible window by 2027. Elevated rates, trade policy shocks, and labor market softening since 2025 raise recession odds above the unconditional base rate. Resolution requires NBER's slow, lagged dating process to actually identify a start date within the window, which adds friction even if a mild downturn occurs.

Answer

GPT (OpenAI): 63% — The call hinges on whether a policy, credit, or external shock produces a broad, sustained downturn by 2027. The NBER Business Cycle Dating Committee must later identify a peak dated no later than December 2027; it often rules with long lags. Since 1857, US expansions have eventually ended, and a two-year window after a mature expansion has a meaningful but far-from-certain recession rate. A resilient labor market and easing inflation would lower the odds; a sharp unemployment rise or credit event would raise them quickly.

Answer

Grok (xAI): 32% — NBER must later date a peak no later than Dec 2027. NBER announces 6–18 months after the peak, so a 2027 start is still dated by the 2029-10-17 cutoff. Post-WWII US expansions last ~5–6 years on average; a 15-month window from Oct 2026 therefore carries a ~25% base rate. The current cycle already exceeds that length with no contraction yet, so the odds sit only modestly above the historical rate unless unemployment or industrial…

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DeepSeek (DeepSeek): 18% — Whether a broad contraction actually begins by late 2027, not when NBER acknowledges it. NBER peak dates require a decline in real activity lasting more than a few months, so a late-2026 start could only be declared if data through 2027 confirm broad… Only the eight-member NBER Business Cycle Dating Committee acts, and it typically waits 9-21 months after a peak; no declaration can be known until 2028 at the earliest. Labor-market resilience and disinflation made a 2026 downturn less likely than the 2022-2023 consensus implied, so this sits below the 25-30% base rate for recession…

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Qwen (Alibaba): 27% — Expansion age and tariff-driven headwinds raise risk, but US resilience and NBER's declaration lag keep this below even odds. Base rate for recession onset in any 14-month window is ~15%; the expansion will be 6.5+ years old by late 2026, nudging it up. NBER typically declares 6-12 months after a trough, so a recession starting by mid-2027 would likely be called before Oct 2029. Tariff shocks and fiscal tightening are plausible triggers, but the labor market has repeatedly defied bearish forecasts since 2022.

The NBER declares a US recession beginning before the end of 2027.

The Reserve Bank of New Zealand raises its official cash rate at its 29 October 2026 meeting.

The Bank of Canada raises its policy interest rate at its 29 October 2026 meeting.

The Bank of Japan raises its inflation forecasts in its 30 October 2026 outlook report.

The Bank of Japan leaves its policy rate unchanged at its 30 October 2026 meeting.