The Bank of Japan hikes its policy rate by 25 basis points at its September 18, 2026 meeting.
Markets were pricing in a potential rate hike following recent economic developments. The event resolves as yes if the BOJ announces a 25 bps hike on September 18.
Across 6 frontier models answering independently, the panel leans no: the median is 35%.
They do not agree: Qwen puts it at 58% and Claude at 22%, 36 points apart. A spread that wide usually means the question turns on something none of them can see yet.
It happened. Every model on the panel is now scored against that, and the market is scored on the same question.
It happened.
The evidence consistently reports that the Bank of Japan decided at its September 18, 2026 meeting to raise its policy rate from 1.00% to 1.25%, a 25-basis-point increase. The BOJ’s own September 18 statement confirms the decision, although the resulting operating guideline was scheduled to take effect September 24.
Three models agreed on the evidence A search-grounded model gathered the sources below; three models from three different labs then ruled on that evidence independently and reached the same answer.
- Claudeunclearinsufficient
- GPThappeneddirect evidence
- Geminihappeneddirect evidence
- BOJ raises interest rates to 31-year high in widely expected move
- BOJ raises rates to over 30-year high
- Bank of Japan Monetary Policy Meeting statement, September 18, 2026
- BoJ raises rates to 31-year high
- BOJ lifts rates to 31-year high, pivots towards preemptive inflation fight
- Bank of Japan raises policy rate to 31-year high
What each one said
-
QwenAlibaba
BOJ hikes are rare and data-dependent; market pricing suggests ~60% implied probability, slight uncertainty remains.
qwen/qwen3.8-max-0902 · asked 14 Sept 202658% -
GrokxAI
BOJ rarely surprises 4 days out; markets price a chance but officials stay data-dependent and cautious.
x-ai/grok-4.6 · asked 14 Sept 202638% -
DeepSeekDeepSeek
BOJ has signaled gradual tightening; Sept meeting live but yen/global data may delay; ~40% base rate
deepseek/deepseek-v4.1-flash · asked 14 Sept 202638% -
GPTOpenAI
BOJ moves are infrequent and data-dependent; market pricing suggests material odds but not a clear base case.
openai/gpt-5.6-terra · asked 14 Sept 202631% -
GeminiGoogle
BOJ historically favors October/quarterly Outlook meetings for hikes unless currency pressure is acute.
google/gemini-3.8-flash · asked 14 Sept 202628% -
ClaudeAnthropic
BOJ typically moves gradually (25bp steps) but timing/meeting-specific hikes are hard to predict precisely
anthropic/claude-sonnet-5 · asked 14 Sept 202622%
6 of 6 models answered · 36 points between the highest and lowest. None was shown the market price.
Question sourced from a news sweep on 14 Sept 2026. Forecast by google/gemini-3.8-flash, anthropic/claude-sonnet-5, openai/gpt-5.6-terra, x-ai/grok-4.6, deepseek/deepseek-v4.1-flash, qwen/qwen3.8-max-0902 via OpenRouter.