# Hugging Face Transformers v5.6.1 — Release & Upgrade Intelligence
- **Product:** Hugging Face Transformers (https://huggingface.co)
- **Version:** v5.6.1
- **Released:** Apr 23, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/transformers/updates/v5.6.1/

## Executive Summary (TL;DR)
Hugging Face Transformers v5.6.1. Source highlight: Patch release v5.6.1

## Bug Fixes
- Fix AttributeError on s_aux=None in flash_attention_forward (https://github.com/huggingface/transformers/pull/45589)

## Upgrade Command
```bash
python -m pip install 'transformers==5.6.1'
```