# Hugging Face Transformers v4.1.1 — Release & Upgrade Intelligence
- **Product:** Hugging Face Transformers (https://huggingface.co)
- **Version:** v4.1.1
- **Released:** Dec 17, 2020
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/transformers/updates/v4.1.1/

## Executive Summary (TL;DR)
Hugging Face Transformers v4.1.1. Source highlight: v4.1.1: TAPAS, MPNet, model parallelization, Sharded DDP, conda, multi-part downloads.

## New Features
- Experimental support for fairscale ShardedDDP #9139 (@sgugger)
- Add barthez model #8393 (@moussaKam)

## Bug Fixes
- Patch model parallel test #8825, #8920 (@LysandreJik)
- Fix gradient clipping for Sharded DDP #9168 (@sgugger)
- `disable_ngram_loss` fix for prophetnet #8554 (@Zhylkaaa)
- Fix run_ner script #8664 (@sgugger)
- [tokenizers] convert_to_tensors: don't reconvert when the type is already right #8283 (@stas00)
- [examples/seq2seq] fix PL deprecation warning #8577 (@stas00)

## Upgrade Command
```bash
python -m pip install 'transformers==4.1.1'
```