Over the past few months, we made several improvements to our transformers and tokenizers libraries, with the goal of making it easier than ever to train a new language model from scratch. In this post we’ll demo how to train a “small” model (84 M parameters = 6 layers, 768 hidden size, 12 attention heads) – that’s the same number of layers & heads as DistilBERT – on Esperanto. We’ll then fine-tune the model on a downstream task of part-of-speech […]

Note: Edited on July 2023 with up-to-date references and examples. Introduction In recent years, there has been an increasing interest in open-ended language generation thanks to the rise of large transformer-based language models trained on millions of webpages, including OpenAI’s ChatGPT and Meta’s LLaMA. The results on conditioned open-ended language generation are impressive, having shown to generalize to new tasks, handle code, or take non-text data as input. Besides the improved transformer architecture and massive unsupervised training data, better decoding […]

How the Reformer uses less than 8GB of RAM to train on sequences of half a million tokens The Reformer model as introduced by Kitaev, Kaiser et al. (2020) is one of the most memory-efficient transformer models for long sequence modeling as of today. Recently, long sequence modeling has experienced a surge of interest as can be seen by the many submissions from this year alone – Beltagy et al. (2020), Roy et al. (2020), Tay et al., Wang et […]

In previous blog posts we introduced sparse matrices and what they could do to improve neural networks. The basic assumption is that full dense layers are often overkill and can be pruned without a significant loss in precision. In some cases sparse linear layers can even improve precision or/and generalization. The main issue is that currently available code that supports sparse algebra computation is severely lacking efficiency. We are also still waiting for official PyTorch support. That’s why we ran […]

!pip install transformers==4.2.1 !pip install sentencepiece==0.1.95 The transformer-based encoder-decoder model was introduced by Vaswani et al. in the famous Attention is all you need paper and is today the de-facto standard encoder-decoder architecture in natural language processing (NLP). Recently, there has been a lot of research on different pre-training objectives for transformer-based encoder-decoder models, e.g. T5, Bart, Pegasus, ProphetNet, Marge, etc…, but the model architecture has stayed largely the same. The goal of the blog post is to give an […]

A guest blog post by Richard Liaw from the Anyscale team With cutting edge research implementations, thousands of trained models easily accessible, the Hugging Face transformers library has become critical to the success and growth of natural language processing today. For any machine learning model to achieve good performance, users often need to implement some form of parameter tuning. Yet, nearly everyone (1, 2) either ends up disregarding hyperparameter tuning or opting to do a simplistic grid search with a […]

We’re excited to announce that Transformers.js v4 is now available on NPM! After a year of development (we started in March 2025 🤯), we’re finally ready for you to use it. npm i @huggingface/transformers Performance & Runtime Improvements The biggest change is undoubtedly the adoption of a new WebGPU Runtime, completely rewritten in C++. We’ve worked closely with the ONNX Runtime team to thoroughly test this runtime across our ~200 supported model architectures, as well as many new v4-exclusive architectures. […]

We’re releasing TRL v1.0, and it marks a real shift in what TRL is. What started as a research codebase has become a dependable library people build on, with clearer expectations around stability. This isn’t just a version bump. It reflects the reality that TRL now powers production systems, and embraces that responsibility. TRL now implements more than 75 post-training methods. But coverage isn’t the goal by itself. What matters is making these methods easy to try, compare, and actually […]