# Hugging Face Transformers v4.36.1 — Release & Upgrade Intelligence
- **Product:** Hugging Face Transformers (https://huggingface.co)
- **Version:** v4.36.1
- **Released:** Dec 14, 2023
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/transformers/updates/v4.36.1/

## Executive Summary (TL;DR)
Hugging Face Transformers v4.36.1. Source highlight: A patch release for critical torch issues mostly:

## Bug Fixes
- Fix SDPA correctness following torch==2.1.2 regression #27973
- [Tokenizer Serialization] Fix the broken serialisation #27099
- Fix bug with rotating checkpoints #28009
- Hot-fix-mixstral-loss (#27948)

## Upgrade Command
```bash
python -m pip install 'transformers==4.36.1'
```