Changelog

Changelog for the Amazon Linux 2023-based TensorFlow SageMaker training images (2.21-gpu-py312-cu129-amzn2023-sagemaker and 2.21-cpu-py312-amzn2023-sagemaker).

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TensorFlow 2.21 — 2026-07-10

Tags: 2.21-gpu-py312-cu129-amzn2023-sagemaker · 2.21-cpu-py312-amzn2023-sagemaker · 2.21.0-gpu-py312-cu129-amzn2023-sagemaker · 2.21.0-cpu-py312-amzn2023-sagemaker

Bundled versions: TensorFlow 2.21.0 · Python 3.12 · CUDA 12.9.1 · cuDNN 9.24.0.43 · NCCL 2.30.7 · EFA 1.49.0 · OpenMPI 4.1.8

Highlights

• Initial release of the TensorFlow DLC on Amazon Linux 2023 and Python 3.12
• TensorFlow 2.21.0 for SageMaker AI training (CPU and GPU variants)
• CUDA 12.9.1 with cuDNN 9.24.0.43 and NCCL 2.30.7 on the GPU variant
• EFA 1.49.0 with OpenMPI 4.1.8 for multi-node training on EFA-capable instances
• SageMaker toolkits pre-installed: sagemaker-tensorflow-training, sagemaker-training
• MLflow 3.9+, smclarify, sagemaker>=3.4.0, and SageMaker Studio integrations bundled