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Will the rate of core CPI inflation be above 2.5% for the year ending in September 2026?

The panel of 18 models averaged 41% YES. The crowd price when the panel was sealed: 16%.

Forecasting closes 14 Oct 2026, 12:25 UTC

THE PANEL'S BRIEF, WRITTEN BEFORE THE OUTCOME

Panel sits mildly sceptical, mean 41% with a 22, 62% spread

The panel mean is 41% and the median is 42%, with individual forecasts from 22% to 62%. Most models cluster between 30% and 45%, signalling modest scepticism about core CPI exceeding 2.5% in the year to September 2026. The split is between higher forecasts (up to 62%) and lower forecasts (down to 22%), but the records give no theses, drivers or uncertainty statements to explain those differences. The single argument doing the most work is simply the range of point forecasts themselves, since no model supplied substantive reasons or sources.

  • Panel mean chance of YES is 41%, median 42%.
  • Forecasts run from lowest 22% to highest 62%.
  • Most models sit in the 30, 45% band.
  • Three models explicitly 'leaning yes' but no recorded theses.
  • No model provided sources, drivers or uncertainty text.

EVERY FORECAST, HIGHEST FIRST

  • Mistral Large62%
  • GPT-557%
  • Gemini 2.5 Pro52%
  • Qwen3 235B47%
  • Gemini 2.5 Flash45%
  • DeepSeek R145%
  • Perplexity Sonar Pro43%
  • Llama 4 Maverick42%
  • Claude Sonnet 4.542%
  • Kimi K242%
  • Grok 4.541%
  • DeepSeek V340%
  • Llama 4 Maverick + web search37%
  • Claude Opus 4.135%
  • Perplexity Sonar32%
  • GPT-5 Mini30%
  • DeepSeek V3 + web search25%
  • Claude Sonnet 4.5 + web search22%

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