The European Central Bank raises key interest rates at its next monetary policy meeting following September 20

Question

Six frontier AI models put this at 63% by 9 Nov 2026. Full reasoning from every model.

WillHappen.ai · Accepted Answer

63% — the median of 6 frontier models, resolving by 2026-11-09.

Answer

Gemini (Google): 74% — The Governing Council acts to curb reaccelerating headline inflation when price momentum threatens medium-term anchoring. Eurozone inflation jumping to 3.8% forces hawks like Schnabel to demand immediate 25 bps hikes to the deposit facility rate. The next policy meeting in late October gives little time for price cooling, making a hold risk credibility under ECB mandates. A sharp sudden crash in bank lending or economic activity flash PMIs before late October is the sole factor that would prevent a hike.

Answer

Claude (Anthropic): 30% — Hinges on whether October inflation/growth data by the late-Oct meeting convinces ECB a hike is warranted now rather than later. ECB has held rates steady through most of 2025-26 and typically moves cautiously, needing sustained evidence before acting, not a single CPI print. 3.8% inflation is notable but ECB often prefers to watch 1-2 more data points before hiking, especially with growth still fragile in parts of the eurozone. A hawkish shift in ECB communications or a further inflation surprise before the late-Oct/Nov meeting would push this probability much higher.

Answer

GPT (OpenAI): 63% — Whether October inflation and wage data confirm a persistent 3.8% price shock before the ECB’s late-October meeting. The Governing Council can raise rates at its next scheduled meeting, likely 29 October, without needing legislation or external approval. After inflation near 4%, central banks have often tightened further, but ECB caution and weak growth keep the base case below certainty. A sharp October inflation retreat or worsening activity indicators would most likely turn a hike into a hold.

Answer

Grok (xAI): 72% — Oct 29 2026 hike turns on whether 3.8% Sept inflation is seen as persistent vs one-off energy/food spike. Governing Council must decide at the 29 Oct meeting; Lagarde/Schnabel speeches and Oct flash CPI (due ~31 Oct) set the tone first. Base rate: ECB hiked in 8 of 11 meetings when HICP >3% and rising 2022-23; this case sits slightly below because growth is weaker and prior cycle already peaked. A sub-3.2% Oct print or sudden euro-area PMI collapse would most shift odds against a hike.

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DeepSeek (DeepSeek): 12% — This hinges on whether one month of 3.8% inflation convinces a cautious ECB to hike at its October 29 meeting. The ECB holds rates when inflation is supply-driven and core is stable, and September's 3.8% came with energy base effects after the 2025 cuts. Lagarde and Schnabel have stressed patience, and markets price roughly a 10-15% chance of a hike at the October 29 meeting. Precedent favors a hold at the next meeting absent a sustained upside surprise in wage or services inflation.

Answer

Qwen (Alibaba): 62% — ECB has signaled hawkish bias on 3.8% inflation, but one meeting's data could shift the Governing Council's calculus. ECB's next scheduled meeting after September 2026 falls in late October; with inflation at 3.8% and hawkish forward guidance already priced in, a hike is the base case. However, the ECB has paused mid-cycle before (e.g., October 2023 pause after September hike) when incoming data showed disinflationary momentum, so a single soft CPI… A surprise drop in October flash CPI (due ~Oct 31) or a sharp deterioration in credit conditions would be the main development pushing this below 50.

The European Central Bank raises key interest rates at its next monetary policy meeting following September 2026.

What each one said

The European Central Bank raises key interest rates at its next monetary policy meeting following September 2026.

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.