chronos-2 and chronos-bolt-small are both time-series-forecasting models. See each entry for specifics.
Chronos-2 is Amazon's second-generation pretrained foundation model for zero-shot time-series forecasting. It frames forecasting as a language modeling problem over quantized time-series tokens using a T5 encoder-decoder architecture, enabling it to forecast across diverse domains without per-dataset training. Released under Apache 2.0.
Chronos-Bolt-Small is a small time-series foundation model from AutoGluon, using a T5-based encoder-decoder architecture for zero-shot forecasting. The 'Bolt' variant improves over original Chronos through training and architectural refinements for better speed and accuracy. Apache 2.0 licensed and part of the AutoGluon time-series forecasting ecosystem.
Pick based on your compute budget and specific task requirements.