# Hugging Face Transformers 4.54.1 — Release & Upgrade Intelligence
- **Product:** Hugging Face Transformers (https://huggingface.co)
- **Version:** 4.54.1
- **Released:** Jul 29, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/transformers/updates/4.54.1/

## Executive Summary (TL;DR)
Hugging Face Transformers 4.54.1. Source highlight: Patch release 4.54.1

## Bug Fixes
- Fix Cache.max_cache_len max value for Hybrid models, @manueldeprada, @Cyrilvallez, #39737
- [modenbert] fix regression, @zucchini-nlp, #39750
- Fix version issue in modeling_utils.py, @Cyrilvallez, #39759
- Fix GPT2 with cross attention, @zucchini-nlp, #39754
- Fix mamba regression, @manueldeprada, #39728
- Fix: add back base model plan, @S1ro1, #39733

## Upgrade Command
```bash
python -m pip install 'transformers==4.54.1'
```