Write your own training loop — without managing GPUs — with Amazon SageMaker training session APIs

AWS Machine LearningOctober 22, 2026en

Amazon SageMaker AI training session APIs let you write your own LLM training loop (SFT, RL, or custom objectives) in a Python script while the service runs the GPUs. This post introduces the programming model and three SDK clients, then walks through a GRPO loop on GSM8K and a reinforcement learning workload on competitive programming.

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