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

Amazon SageMaker offers training session APIs that let developers write custom LLM training loops in Python while the service manages GPUs. The post explains the programming model, three SDK clients, and demonstrates a GRPO loop on GSM8K and a reinforcement learning workload for competitive programming. This enables more flexible, GPU‑managed training pipelines for AI builders.

Opening Kapyn…