ForecastBench is a dynamic, continuously updated benchmark that measures the forecasting accuracy of AI systems on a constantly changing set of questions. We evaluate AI systems by regularly asking them to make forecasts about future events, thereby creating a benchmark that remains contamination-free over time. By surveying both the general public and superforecasters, the benchmark also provides measures of human accuracy against which one can assess the performance of AI systems.<\/p>\n\n\n\n