T0: 256M Open-Weights Time-Series Forecasting Model

About

t0-gamma is a 256M parameter open-weights foundation model for time series that forecasts zero-shot, without training on the user's data. It runs on CPU, GPU, or Apple chips and can use future-known inputs such as holidays, promotions, and weather forecasts. The authors report it ranks first among time-series foundation models on GIFT-Eval, fev-bench, and TIME, and cuts error by a third on European day-ahead electricity prices versus a repeat-yesterday baseline.