The Federal Reserve raises its 2026 core PCE inflation projection at its next Summary of Economic Projections.

Question

Six frontier AI models put this at 35% by 1 Jan 2027. Full reasoning from every model.

WillHappen.ai · Accepted Answer

35% — the median of 6 frontier models, resolving by 2027-01-01.

Answer

Gemini (Google): 27% — Late-year core PCE revisions rarely jump higher without acute Q4 price shocks given that three quarters of 2026 data are already banked. By the December 2026 FOMC meeting, October and November prints leave minimal room for full-year median projections to shift upward. Base rate of upward revisions to current-year core PCE at December SEPs is roughly 30% as disinflation or stability usually prevails. A sharp rebound in annualized monthly core PCE above 0.35% across Q4 would be required to push the median projection above 3.4%.

Answer

Claude (Anthropic): 25% — Depends on whether incoming 2026 inflation data runs hotter than the Fed's September forecast assumed. The next SEP is released at the December 2026 FOMC meeting, giving a full year of data to revise projections. SEP median projections for the same year tend to converge toward actual trends as the year progresses, typically pulling 2026 estimates down not up given the long… Fed officials have generally signaled gradual disinflation; a meaningful upward revision would require a clear tariff/inflation surprise or sustained hot CPI/PCE prints…

Answer

GPT (OpenAI): 42% — It hinges on whether autumn inflation data show tariff and services pressures persisting into 2026 rather than fading. The December 2026 SEP is the likely next projection round; the Board and 19 participants must move the median above 3.4%. Forecast medians often change by 0.1–0.3 points, but a 3.4% core-PCE estimate already embeds substantial persistence. A run of upside core PCE prints through November—especially tariff pass-through—would materially raise the odds of an upward revision.

Answer

Grok (xAI): 28% — Dec 2026 SEP median for 2026 core PCE exceeds Sept’s 3.4% only if Oct-Nov prints run well above the implied path. Next SEP drops at the 9-10 Dec FOMC; the median is the 10th of 19 dots and already incorporates data through Nov. Current-year inflation medians shift in ~55% of December SEPs and usually toward YTD realized, so a rise from an already-high 3.4% sits below that base rate. A pair of 0.4%+ m/m core PCE prints would flip the call; otherwise the committee is more likely to hold or trim.

Answer

DeepSeek (DeepSeek): 55% — Turns on whether the next SEP's 2026 core PCE median lands above 3.4%, which needs inflation to stop cooling between now and December. The next SEP comes at the December 8-9 FOMC, so the median is set by data through November and the committee's read of tariff pass-through. September's 3.4% was already an upward revision, and core PCE has run sticky near 3% with tariffs still feeding through, so a further bump is plausible but not forced. Base rate for the Fed revising its own inflation forecast up in the very next SEP after an upward revision is modest; the thing that flips me is a hot October or…

Answer

Qwen (Alibaba): 72% — Tariff-driven price pressures make it hard for the Fed to hold or lower its 2026 core PCE median from 3.4%. The next SEP is likely the December 2026 meeting; incoming data through Q3-Q4 will show whether tariff pass-through has pushed core PCE above the September trajectory. The Fed has revised core PCE projections upward in 4 of the last 6 SEP cycles since 2022, reflecting a persistent bias toward underestimating inflation persistence. A downward revision would require a sharp disinflationary surprise—e.g., a labor-market collapse or rapid tariff reversal—which is possible but not the modal path given…

The Federal Reserve raises its 2026 core PCE inflation projection at its next Summary of Economic Projections.

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The upcoming U.S. headline PCE inflation reading meets or exceeds 3.7% year over year.

The next Euro-area composite PMI release remains at or above 53.1.

The Federal Reserve raises its target interest rate in December 2026.