AdapterHub: A Framework for Adapting Transformers
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Abstract (arXiv)
The current modus operandi in NLP involves downloading and fine-tuning pre-trained models consisting of millions or billions of parameters. Storing and sharing such large trained models is expensive, slow, and time-consuming, which impedes progress towards more general and versatile NLP methods that learn from and for many tasks. Adapters -- small learnt bottleneck layers inserted within each layer of a pre-trained model -- ameliorate this issue by avoiding full fine-tuning of the entire model. However, sharing and integrating adapter layers is not straightforward. We propose AdapterHub, a framework that allows dynamic "stitching-in" of pre-trained adapters for different tasks and languages. The framework, built on top of the popular HuggingFace Transformers library, enables extremely easy and quick adaptations of state-of-the-art pre-trained models (e.g., BERT, RoBERTa, XLM-R) across tasks and languages. Downloading, sharing, and training adapters is as seamless as possible using minimal changes to the training scripts and a specialized infrastructure. Our framework enables scalable and easy access to sharing of task-specific models, particularly in low-resource scenarios. AdapterHub includes all recent adapter architectures and can be found at https://AdapterHub.ml.
Key facts. Cited by 441 papers in the map (data through 7 Oct 2026). First posted on arXiv 15 Jul 2020.
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Citing papers per year: 2021: 47; 2022: 91; 2023: 123; 2024: 93; 2025: 54; 2026: 33.
441 papers.
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- 2021Parameter-efficient Multi-task Fine-tuning for Transformers via Shared Hypernetworkscited by 278
- 2021Training Neural Networks with Fixed Sparse Maskscited by 212
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- 2026ES-VP : Energy-Shaped Dynamic Visual Prompting for Efficient Model Adaptation21 Aug 2026
- 2026Curvature-Aware Zeroth-Order Optimization for Memory-Efficient Test-Time Adaptation12 Aug 2026
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- 2026SSM Adapters via Hankel Reduced-order Modeling: Injection Site Determines Task Suitability in Long-Context Fine-Tuning24 Jun 2026
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