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

Question

Six frontier AI models put this at 83% by 1 Nov 2026. Full reasoning from every model.

WillHappen.ai · Accepted Answer

83% — the median of 6 frontier models, resolving by 2026-11-01.

Answer

Gemini (Google): 88% — The BOJ rarely surprises markets without prior Nikkei signaling, making an untelegraphed back-to-back hike extremely improbable. Governor Ueda and the Policy Board face no immediate inflation shock requiring consecutive hikes five days out from the meeting. Central banks hold steady at over 80% of meetings during tightening cycles to assess lagged effects of prior hikes. A sudden yen collapse or an emergency pre-meeting leak to Japanese media would be the only trigger to prompt an unpriced hike.

Answer

Claude (Anthropic): 74% — Hinges on inflation/wage data through late October and whether BOJ sees urgency to hike again so soon after prior move. Central banks rarely hike in consecutive meetings without clear acceleration in inflation data, and reports suggest no immediate pressure. BOJ has historically moved gradually and cautiously, often pausing for multiple meetings between hikes to assess impact. A sharp yen depreciation or upside inflation surprise before Oct 30 could push BOJ to act, which would lower this probability.

Answer

GPT (OpenAI): 78% — Absent a sharp inflation or yen shock, the BOJ is more likely to pause five days after the available signals than hike again. The Policy Board must secure a majority on 30 October; rate changes typically follow sustained wage, inflation, or FX evidence. Central banks commonly hold after a hike to assess transmission, and reports of no immediate tightening pressure reinforce that baseline. A sudden yen slide, upside Tokyo CPI surprise, or revised inflation outlook before 30 October would materially raise hike odds.

Answer

Grok (xAI): 82% — BOJ board sees no case for a second hike five days after the last one. Nine-member board votes 30 Oct; consensus and guidance already point to a hold after the prior move. BOJ consecutive-hike rate is low; pauses dominate once a hike is delivered unless data surprise. Only a yen crash or CPI shock before the meeting would flip it; none is flagged in current reports.

Answer

DeepSeek (DeepSeek): 92% — Ueda's board has no meeting between now and 30 October that forces a move, and no data lands before then. The BOJ has never hiked at a meeting with no intervening data release; the next CPI print is 20 November, after this meeting. The board's September minutes showed a majority wanting to 'assess' the prior hike's pass-through, and Ueda has said no preset timetable. Base rate: since 2024 the BOJ has held at roughly 70% of meetings; this one sits above that because no fresh inflation or wage data arrives before 30 October.

Answer

Qwen (Alibaba): 84% — BOJ just hiked and signals point to a pause; surprise hikes without forward guidance are historically rare. BOJ has hiked only 3 times since 2007 and each was heavily telegraphed weeks ahead via board member speeches and leaks. Context explicitly notes no immediate tightening pressure, and with only 5 days to the meeting a hawkish pivot would need visible signals by now. A sharp yen drop or upside inflation surprise could force their hand, but absent that trigger the base rate of holding after a recent hike is very high.

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