Chronos (time series models)
Family overview — summarizes releases; licenses and availability belong to each release.
Maintained by Amazon (Amazon Web Services)134
Chronos is Amazon's family of pretrained time-series forecasting models. It includes the original T5-based Chronos models (March 2024, 8M to 710M parameters), the patch-based Chronos-Bolt models (November 2024), and Chronos-2 (October 2025), a 120M-parameter encoder-only model that adds multivariate and covariate-informed forecasting.12
- Repository: chronos-forecasting repository (external site: github.com)
- Model hub: Chronos models on Hugging Face (external site: huggingface.co)
- Paper: Chronos-2: From Univariate to Universal Forecasting (arXiv 2510.15821) (external site: arxiv.org)
- Paper: Original Chronos paper (arXiv 2403.07815) (external site: arxiv.org)
Releases assessed
| Release | Weights | Tier (USASI rubric v0.1) | License | Released |
|---|---|---|---|---|
| Chronos-2 | Weights: Public | Model-disclosure tier (USASI rubric v0.1): Open-weight | Apache-2.0, Apache-2.0 | Oct 20, 2025 |
What it is useful for
Organization context
U.S. eligibility
Eligible · basis: Documented U.S. control
The models are published by Amazon under the amazon-science GitHub organization and the amazon Hugging Face organization, and Amazon's science blog and the Chronos-2 report attribute the work to Amazon Web Services, a segment of Amazon.com, Inc. Amazon.com, Inc. has its principal executive offices in Seattle, Washington, per its fiscal 2025 Form 10-K.1345
Sources
This listing is not an endorsement, a safety assessment, or a federal approval.