chronos-2 and chronos-bolt-base 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-Base is the base-size variant of Amazon's improved Chronos forecasting model series, using a T5 encoder-decoder architecture. The Bolt series improves training efficiency over the original Chronos through revised architectural choices, achieving better forecast accuracy at equivalent model sizes. Apache 2.0 licensed.
Pick based on your compute budget and specific task requirements.