This document is relevant for: Inf1, Inf2, Trn1, Trn2, Trn3

AWS Neuron SDK Release Notes - v2.33.1#

Release Date: November 11, 2026

Release 2.33.1 of the AWS Neuron SDK includes bug fixes applied to the AWS Neuron SDK v2.33.0. See the Neuron SDK v2.33.0 release notes for the full set of changes that shipped with the 2.33.0 release.

Changes in 2.33.1#

Neuron Runtime#

  • Corrects the internal execution order that triggers DMA engines in HWDGE (DmaDirect2d and DmaTranspose on non-GPSIMD engines) to remove a race condition between HWDGE and other transpose DMA (like collectives) that can hang the TPB AXI fabric.

  • Adds a check that halts GPSIMD with an error message when it encounters DmaGatherTranspose indices whose validity is not strictly in groups of 16 (instead of causing an xbar AXI hang).

Framework packages#

  • libtorch_neuronx_lite, libneuronxla, and jax_neuronx are rebuilt against the updated Neuron Runtime and dependencies. They contain no functional changes.

Package updates#

Neuron 2.33.1 updates the following packages. All other packages are the same as in Neuron 2.33.0.

  • aws-neuronx-collectives: 2.35.49.0

  • aws-neuronx-dkms: 2.31.8.0

  • aws-neuronx-oci-hook: 2.19.74.0

  • aws-neuronx-runtime-lib: 2.35.33.0

  • jax_neuronx: 0.10.0.1.0.15472

  • libneuronxla: 3.0.12293.0

  • libtorch_neuronx_lite: 2.11.0.1.0.4089, 2.12.0.1.0.4089, and 2.13.0.1.0.4089

  • nrtpy: 2.35.33

Neuron 2.33.1 release artifacts

The libraries and packages updated in this Neuron release.

Previous releases#

This document is relevant for: Inf1, Inf2, Trn1, Trn2, Trn3