# Hugging Face Transformers v4.5.0 — Release & Upgrade Intelligence
- **Product:** Hugging Face Transformers (https://huggingface.co)
- **Version:** v4.5.0
- **Released:** Apr 06, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/transformers/updates/v4.5.0/

## Executive Summary (TL;DR)
Hugging Face Transformers v4.5.0. Source highlight: v4.5.0: BigBird, GPT Neo, Examples, Flax support

## New Features
- [Notebook] add BigBird trivia qa notebook #10995 (@patrickvonplaten)
- [Docs] Add blog to BigBird docs #10997 (@patrickvonplaten)
- Add `examples/multiple-choice/run_swag_no_trainer.py` #10934 (@stancld)
- Add `examples/run_ner_no_trainer.py` #10902 (@stancld)
- Add `examples/language_modeling/run_mlm_no_trainer.py` #11001 (@hemildesai)
- Add `examples/language_modeling/run_clm_no_trainer.py` #11026 (@hemildesai)

## Bug Fixes
- [BigBird] Fix big bird gpu test #10967 (@patrickvonplaten)
- GPT Neo few fixes #10968 (@patil-suraj)
- [GPT Neo] fix example in config #10993 (@patil-suraj)
- [Example] Fixed finename for Saving null_odds in the evaluation stage in QA Examples #10939 (@bhadreshpsavani)
- [trainer] Fixes Typo in Predict Method of Trainer #10861 (@bhadreshpsavani)
- Patches the full import failure and adds a test #10750 (@LysandreJik)

## Upgrade Command
```bash
python -m pip install 'transformers==4.5.0'
```