The European Central Bank leaves interest rates unchanged at its 29 October 2026 meeting.

Question

Six frontier AI models put this at 63% by 1 Nov 2026. Full reasoning from every model.

WillHappen.ai · Accepted Answer

63% — the median of 6 frontier models, resolving by 2026-11-01.

Answer

Gemini (Google): 74% — The Governing Council favors pausing to digest past moves over reactive hikes driven by temporary supply-side energy spikes. ECB rhetoric consistently prioritizes core inflation trends over headline energy blips when setting key policy rates. Central banks rarely shift policy rates late in an tightening cycle without clear signs of de-anchored inflation expectations. A sharper-than-projected jump in flash core CPI or aggressive hawkish guidance before October 29 would drive an immediate hike.

Answer

Claude (Anthropic): 62% — Hinges on whether ECB sees the September inflation spike as transitory or sticky enough to demand a hike. ECB has held the deposit rate steady since mid-2025 after its cutting cycle ended, showing a strong bias toward stability absent shocks. A jump to 3.8% inflation from energy costs raises hawkish risk, but central banks often treat energy-driven spikes as base-effect noise rather than cause for a hike this… If hard data between now and Oct 29 confirms core inflation also accelerating, expect market pricing to shift toward a hike, which would lower this probability.

Answer

GPT (OpenAI): 63% — Whether the September energy spike looks temporary in October data will decide if the Governing Council can wait. The 26-member Governing Council must agree on 29 October; its quarterly projections are not due until December. Meeting-to-meeting holds are the usual ECB outcome, but 3.8% headline inflation is well above the 2% target. A sharp October core-inflation rise or durable energy shock would most likely tip the decision toward another hike.

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Grok (xAI): 62% — Whether the Council treats the 3.8% energy-driven print as transitory rather than hiking on 29 Oct. Lagarde and the 26 governors vote in four days with no extra inflation data arriving first. Holds occur at ~70% of consecutive meetings, but 3.8% vs 2% target sits this case below that rate. A hawkish leak or further energy spike before Thursday would most change the call.

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DeepSeek (DeepSeek): 71% — A single meeting four days out, with no scheduled data forcing a move, defaults to hold unless the Governing Council has already signalled otherwise. The ECB's own communication rule is that rate changes are pre-announced or justified by fresh projections; the October meeting has no new staff projections, so a… September HICP at 3.8% is above target but driven by energy base effects the ECB has repeatedly said it looks through; core inflation and wages are the triggers for… Base rate: the ECB has changed rates at only a minority of meetings since 2022, and when it has, it was during an active hiking or cutting cycle; we are in a pause, so…

Answer

Qwen (Alibaba): 62% — Energy-driven inflation at 3.8% gives the ECB cover to wait, but the level is high enough that a hike is a live option. The ECB historically leaves rates unchanged at roughly 70% of meetings; supply-side energy shocks lower the urgency to act immediately. With only 4 days to the meeting, Lagarde's recent speeches and the September minutes would have already signaled intent; a surprise move is rare at this stage. A hawkish surprise (hike) becomes more likely if October flash PMI or wage data show second-round effects spreading beyond energy.

The European Central Bank leaves interest rates unchanged at its 29 October 2026 meeting.

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