IBM publishes Granite timeseries ensemble recipe with probabilistic and IQR aggregation
IBM's Granite TSFM provides a permissively licensed ensemble recipe that combines four pre-trained Granite architectures to produce median and quantile forecasts without retraining or fitted ensemble weights. Two aggregation recipes are available — a default Probabilistic Ensemble (uniform probability pooling) and an IQR-based weighting variant — downloadable via Hugging Face and evaluated across 97 GIFT-Eval configurations with leaderboard scores captured on 20 October 2026.