Update README.md

README.md

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 <img src="https://huggingface.co/ltg/norbert3-base/resolve/main/norbert.png" width=12.5%>
 
-The official release of a new generation of NorBERT language models described in paper [**NorBench — A Benchmark for Norwegian Language Models**](https://openreview.net/forum?id=WgxNONkAbz). Plese read the paper to learn more details about the model.
+The official release of a new generation of NorBERT language models described in paper [**NorBench — A Benchmark for Norwegian Language Models**](https://arxiv.org/abs/2305.03880). Plese read the paper to learn more details about the model.
 
 
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