The Federal Reserve raises the federal funds rate at its September 16, 2026 meeting.

Question

Six frontier AI models put this at 4% by 23 Sept 2026. Full reasoning from every model.

WillHappen.ai · Accepted Answer

4% — the median of 6 frontier models, resolving by 2026-09-23.

Answer

Gemini (Google): 4% — The Fed rarely hikes rates abruptly without extensively prepping markets via public communications beforehand. FOMC meetings resolve today, and surprise hikes absent weeks of telegraphed forward guidance have near-zero modern precedent. Macro conditions in 2026 skew neutral to easing, making an immediate hike counter to prevailing policy trajectory. Odds would only rise if Fed funds futures had priced in a major tightening move over the final 48 hours, which did not occur.

Answer

Claude (Anthropic): 3% — Fed is on a cutting path amid labor softening; a hike would require an inflation shock not currently signaled. Markets and Fed dot plots through 2026 have priced cuts or holds, not hikes, given cooling labor data. Base rate for a hike immediately after a cutting cycle within one meeting is extremely low absent a CPI surprise. Only a sudden inflation spike or wage shock before Sept 16 could flip this, and no such data is indicated in context.

Answer

GPT (OpenAI): 7% — It hinges on whether officials see inflation reaccelerating enough to override their usual reluctance to hike into late-cycle uncertainty. The FOMC must approve a higher target range at its September 16 announcement; one-day resolution leaves no time for data-driven reversal. Since 2000, September hikes are uncommon, and hikes after markets had not broadly priced one are rarer; a surprise hike needs acute inflation alarm. A materially hotter August CPI or wage report, or an unexpected inflation-forecast jump in the SEP, would most raise the odds.

Answer

Grok (xAI): 12% — FOMC must vote a higher funds-rate target at the Sept 16-17 meeting. Announcement comes ~2pm ET 17 Sep; they hike only if a majority votes to lift the 25bp range. Hikes occur in ~10% of meetings outside hiking cycles; recent prints shifted markets but left no clear majority for a surprise move. A hotter CPI or payrolls print already released would have been the main odds-changer; none remains before the vote.

Answer

DeepSeek (DeepSeek): 4% — A hike requires the FOMC to reverse an easing bias it has held since late 2025, with no meeting left to do it. The FOMC has been cutting or holding since 2025; a 25bp hike would be the first reversal, and no dot plot or speech has flagged one. September 2026 SEP would need a median dot above the current target range, but recent inflation prints have been cooling, not accelerating. Base rate for a hike at a meeting following an easing cycle within 12 months is under 5%; this case sits below it given labor softening.

Answer

Qwen (Alibaba): 3% — The Fed is almost certainly in a cutting or holding cycle, not a hiking one, by September 2026. Fed funds rate has been on a downward path since late 2024; no major forecast calls for a hike by Sep 2026. Inflation has been trending toward 2%, and labor market softening argues for cuts, not hikes. A hike would require a sudden inflation shock with no time for markets to price it in—extremely unlikely given forward guidance norms.

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