# Hugging Face Transformers v5.13.1 — Release & Upgrade Intelligence
- **Product:** Hugging Face Transformers (https://huggingface.co)
- **Version:** v5.13.1
- **Released:** Jul 11, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/transformers/updates/v5.13.1/

## Executive Summary (TL;DR)
Hugging Face Transformers v5.13.1. Source highlight: Patch release v5.13.1

## Bug Fixes
- Be more defensive with remap_legacy_layer_types for custom models (#47245) from @hmellor
- Fix custom code which doesn't know about the new linear layer type names (#47174) from @hmellor
- Fix case where _LazyAutoMapping.register is passed a str key (#47148) from @hmellor

## Upgrade Command
```bash
python -m pip install 'transformers==5.13.1'
```