Hugging Face Transformers: # v4.20.1 Patch release

Source available — automated, not human-reviewed

Component: transformers · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Compatibility not verified — check source notes

$ python -m pip install 'transformers==4.20.1'

📄 .MD

✨ Features 1

⚡ Executive Summary (TL;DR)

Hugging Face Transformers v4.20.1. Source highlight: This patch releases fixes a bug in the OPT models and makes Transformers compatible with `huggingface_hub` version 0.8.1.

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Who Does This Impact? (Role-Based Analysis)

💻 Software Engineers & Devs

Check the source notes against the package and APIs you use before upgrading.

📊 Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

⚙️ DevOps & Security

Verify the target version, runtime requirements and rollback procedure in the official documentation.

✨ New Features & Capabilities (1)

Add final_layer_norm to OPT model #17785

📄 View Raw Release Notes (Original Developer Log)

This patch releases fixes a bug in the OPT models and makes Transformers compatible with `huggingface_hub` version 0.8.1. * Add final_layer_norm to OPT model #17785 * Prepare transformers for v0.8.0 huggingface-hub release #17716

← Older Version Hugging Face Transformers v4.20.0 Newer Version → Hugging Face Transformers v4.21.0