Add arxiv report link to README

README.md

@@ -17,6 +17,7 @@ trillion tokens of English text.
 
 ![Covenant-72B](assets/covenant-72b.webp)
 
+For more details, see the [technical report](https://arxiv.org/abs/2603.08163).
 This is a base model. See [Covenant-72B-Chat](https://huggingface.co/1Covenant/Covenant-72B-Chat) for the instruction-tuned variant.
 
 **Covenant-72B** was trained with 20+ globally distributed participants