2.40.1 2025-12-03
Amazon Bedrock
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Features
- Adding support in Amazon Bedrock to customize models with reinforcement fine-tuning (RFT) and support for updating the existing Custom Model Deployments.
Amazon S3
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Bugfixes
- Fix NPE issue thrown when using multipart S3 client to upload an object containing empty content without supplying a content length. See #6464
Amazon SageMaker Service
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Features
- Introduces Serverless training: A fully managed compute infrastructure that abstracts away all infrastructure complexity, allowing you to focus purely on model development. Added AI model customization assets used to train, refine, and evaluate custom models during the model customization process.