Nomic Embed: Training a Reproducible Long Context Text Embedder

This technical report describes the training of nomic-embed-text-v1, the first fully reproducible, open-source, open-weights, open-data, 8192 context length English text embedding model that outperforms both OpenAI Ada-002 and OpenAI text-embedding-3-small on short and long-context tasks. We release the training code and model weights under an Apache 2 license. In contrast with other open-source models, we release a training data loader with 235 million curated text pairs that allows for the full replication of nomic-embed-text-v1. You can find code and data to replicate the model at https://github.com/nomic-ai/contrastors

@article{nussbaum2025_2402.01613,
  title={ Nomic Embed: Training a Reproducible Long Context Text Embedder },
  author={ Zach Nussbaum and John X. Morris and Brandon Duderstadt and Andriy Mulyar },
  journal={arXiv preprint arXiv:2402.01613},
  year={ 2025 }
}