# Hugging Face Transformers v5.15.1 — Release & Upgrade Intelligence
- **Product:** Hugging Face Transformers (https://huggingface.co)
- **Version:** v5.15.1
- **Released:** Aug 19, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/transformers/updates/v5.15.1/

## Executive Summary (TL;DR)
Hugging Face Transformers v5.15.1. Source highlight: Patch release v5.15.1

## Bug Fixes
- Fix DFlash candidate token device mismatch with device_map="auto" (#47877) by @sywangyi and @Cyrilvallez
- Align logit distributions for CandidateGenerators using sampling  (#48007)
- Fix MTP config when mlp_layer_types is absent (#48015)
- Fallback from 'lanczos' to 'bicubic' when on cuda (#48026)
- Fix gemma4 video to device (#47896)

## Upgrade Command
```bash
python -m pip install 'transformers==5.15.1'
```