# Torch 2.9.1 + Triton 3.5.1 + SymPy 1.13.3 — Software interface version compatibility

For Torch 2.9.1 + Triton 3.5.1 + SymPy 1.13.3, product is PyTorch + Triton; software version is 2.9.1; dependency version is Triton 3.5.1; companion package versions is SymPy 1.13.3, recorded from its source on 2026-08-04.

- **Product:** PyTorch + Triton _(unconfirmed — we could not tie this to the quote below)_
- **Version pairing:** Torch 2.9.1 + Triton 3.5.1 + SymPy 1.13.3 _(unconfirmed — we could not tie this to the quote below)_
- **Software version:** 2.9.1
- **Dependency version:** Triton 3.5.1
- **Companion package versions:** SymPy 1.13.3

## What the source says

> Torch 2.9.1 → Triton 3.5.1 → SymPy 1.13.3

## Source

- https://medium.com/@vici0549/the-definitive-guide-to-pytorch-cuda-and-flash-attention-compatibility-ebec1161ec10

Last verified: 2026-08-04. Review by: 2026-10-03.
Part of [Software interface version compatibility](https://referencesource.org/software-interface-version-compatibility/).