# Hugging Face Transformers v4.49.0 — Release & Upgrade Intelligence
- **Product:** Hugging Face Transformers (https://huggingface.co)
- **Version:** v4.49.0
- **Released:** Feb 17, 2025
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/transformers/updates/v4.49.0/

## Executive Summary (TL;DR)
Hugging Face Transformers v4.49.0. Source highlight: Helium-1 preview is a lightweight language model with 2B parameters, targeting edge and mobile devices. It supports the following languages: English, French, German, Italian, Portuguese, Spanish.

## Breaking Changes & Deprecations
- Breaking changes ### DPT segmentation maps
- Revert qwen2 breaking changes related to attention refactor  by @ArthurZucker in #36162

## New Features
- Add-helium  by @ArthurZucker in #35669
- add qwen2.5vl  by @ShuaiBai623 in #35569
- Add SuperGlue model  by @sbucaille in #29886
- Add Zamba2  by @pglorio in #34517
- Add GOT-OCR 2.0 to Transformers  by @yonigozlan in #34721
- Add DAB-DETR for object detection  by @conditionedstimulus in #30803

## Bug Fixes
- 🚨🚨🚨 An attempt to fix #29554. Include 'LayerNorm.' in gamma/beta rename scope, optimize string search.  by @rwightman in #35615
- [generate] shape checks in tests compatible with fixed-length caches (+ some minor fixes)  by @gante in #35993
- fix document qa bf16 pipeline  by @jiqing-feng in #35456
- fix low-precision audio classification pipeline  by @jiqing-feng in #35435
- Fix Audio Classification Pipeline top_k Documentation Mismatch and Bug #35736  by @sambhavnoobcoder in #35771
- Fix flaky `test_custom_4d_attention_mask`  by @ydshieh in #35606

## Upgrade Command
```bash
python -m pip install 'transformers==4.49.0'
```