Train Qwen3 on AWS Trainium with torchtitan
AWS provides a guide to training Qwen3 with torchtitan on a single trn2.48xlarge using Transformers v5, torchtitan’s native Qwen3 implementation, and NKI mixture-of-experts kernels. The configurations share a torchrun launch pattern and configuration structure, with examples for loading and saving Hugging Face checkpoints. The guide also demonstrates custom kernel registration and autograd integration, explicitly presenting that example as an integration demonstration rather than a performance improvement.

Why it matters
The walkthrough provides a reusable pattern for integrating custom training kernels through operator registration, autograd, and configuration overrides, with numerical comparisons to check correctness before training.











