# Hugging Face Transformers v4.55.1 — Release & Upgrade Intelligence
- **Product:** Hugging Face Transformers (https://huggingface.co)
- **Version:** v4.55.1
- **Released:** Aug 13, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/transformers/updates/v4.55.1/

## Executive Summary (TL;DR)
Hugging Face Transformers v4.55.1. Source highlight: Patch release 4.55.1:

## Bug Fixes
- Idefics2, Idefics3, SmolVLM – Fix tensor device issue (#39975)
- Merge conflicts – Fix merge conflicts from previous changes
- MXFP4 / CPU device_map – Default to dequantize when CPU is in device_map (#39993)
- GPT Big Code – Fix attention scaling (#40041)
- Windows compatibility – Resolve Triton version check compatibility (#39986) by @Tsumugii24 @MekkCyber
- Gemma3n model – Add missing None default values for get_placeholder_mask (#39991, #40024)

## Upgrade Command
```bash
python -m pip install 'transformers==4.55.1'
```