amazon-science/chronos-forecasting v2.1.0

2.1.0

Repository: amazon-science/chronos-forecasting

Tag: v2.1.0

Published: 2025-11-21T10:58:04Z

Prerelease: no

Release notes:

🚀 What's New?

• Chronos-2 can now be deployed on AWS via SageMaker JumpStart. Please check this notebook for details.
• Scaled Dot Product Attention (SDPA) is now used as the default attention implementation in Chronos-2. If you need to use the previous eager implementation, please load the model with Chronos2Pipeline.from_pretrained(..., attn_implementation="eager").
• predict_df support has been added for older Chronos and Chronos-Bolt models. Now, all models (Chronos-2, Chronos-Bolt, Chronos) provide a unified pandas dataframe API. Note: Only Chronos-2 supports multivariate and covariate-informed forecasting.
• Chronos2Pipeline.embed has been added, enabling users to extract embeddings from the _last layer_ of the Chronos-2 encoder.

🐛 Bug Fixes

• Fixed issues related to past-only covariates use during Chronos-2 fine-tuning. If you're fine-tuning Chronos-2 models, we strongly recommend upgrading to `chronos-forecasting==2.1.0`.
• Fixed issue related to multiple workers on windows.

All Changes

• Fix pandas install instruction by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/326
• Scope down GitHub token permissions by @AdnaneKhan in https://github.com/amazon-science/chronos-forecasting/pull/328
• Update Chronos-2 notebook install instructions by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/333
• Add logging steps in fine-tuning example by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/334
• [chronos-2] add support for SDPA by @kashif in https://github.com/amazon-science/chronos-forecasting/pull/331
• Treat notebooks as documentation in linguist by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/338
• Count notebooks as python in language stats by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/347
• Move SageMaker notebook to a new path by @shchur in https://github.com/amazon-science/chronos-forecasting/pull/348
• Revert "Move SageMaker notebook to a new path" by @shchur in https://github.com/amazon-science/chronos-forecasting/pull/349
• fix validate_and_prepare_single_dict_task by separating "past only" and "future known" cov keys by @HarvestStars in https://github.com/amazon-science/chronos-forecasting/pull/344
• Add Chronos-2 SageMaker notebook by @shchur in https://github.com/amazon-science/chronos-forecasting/pull/350
• Update model link to Hugging Face by @shchur in https://github.com/amazon-science/chronos-forecasting/pull/353
• Remove logo from README by @shchur in https://github.com/amazon-science/chronos-forecasting/pull/355
• Update Notebooks and README by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/356
• Add FutureWarning for CloudFront by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/357
• Relax transformers lower bound to >=4.41 by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/364
• Set num_workers=0 in Chronos-2 test data loader by @IliasAarab in https://github.com/amazon-science/chronos-forecasting/pull/365
• Update long horizon heuristic for Chronos-Bolt by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/366
• Add predict_df support for Chronos and Chronos-Bolt by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/371
• Add Chronos2Pipeline.embed by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/361
• Mask past-only covariates during loss computation by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/379
• Chronos-2: Change default fine-tuning learning rate and remove experimental label by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/381
• Update version to 2.1.0rc1 for pre-release by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/383
• Update torch dependency version to >=2.2,<3 by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/388
• Bump version to 2.1.0 by @abdulfatir in https://github.com/amazon-science/chronos-forecasting/pull/389

New Contributors

• @AdnaneKhan made their first contribution in https://github.com/amazon-science/chronos-forecasting/pull/328
• @kashif made their first contribution in https://github.com/amazon-science/chronos-forecasting/pull/331
• @HarvestStars made their first contribution in https://github.com/amazon-science/chronos-forecasting/pull/344
• @IliasAarab made their first contribution in https://github.com/amazon-science/chronos-forecasting/pull/365

Full Changelog: https://github.com/amazon-science/chronos-forecasting/compare/v2.0.1...v2.1.0