.. meta::
   :description: Reference documentation for legacy PyTorch/XLA training, NxD Training, and NxD Core training on AWS Neuron.
   :keywords: AWS Neuron, legacy training, PyTorch XLA, torch-neuronx, NxD Training, NxD Core
   :date-modified: 2026-10-12

.. _legacy-training-frameworks:

Legacy training frameworks
==========================

Find the existing reference documentation for the PyTorch/XLA training path
and its distributed training libraries:

- :doc:`NxD Training and PyTorch/XLA training </archive/nxd-training/index>`:
  Library overview, setup, tutorials, developer guides, and API references for
  NxD Training and the XLA-based ``torch-neuronx`` training flow.
- :doc:`NxD Core for training </archive/libraries/neuronx-distributed/index-training>`:
  Distributed training primitives, setup, developer guides, and API references.

These links point to the existing documentation; see each destination for its
support status. For current training options, see
:ref:`Train models on Neuron <training-home>`.

For inference documentation, see
:ref:`Legacy inference frameworks <inference-legacy-home>`.