Update README.md

README.md

@@ -8,4 +8,4 @@ language:
 
 The extrapolated (ExPO) model based on [`Nexusflow/Starling-LM-7B-beta`](https://huggingface.co/Nexusflow/Starling-LM-7B-beta) and [`openchat/openchat-3.5-0106`](https://huggingface.co/openchat/openchat-3.5-0106), as in the "[Weak-to-Strong Extrapolation Expedites Alignment](https://arxiv.org/abs/2404.16792)" paper.
 
-Specifically, we obtain this model by extrapolating from the weights of the SFT and DPO/RLHF checkpoints, achieving superior alignment with human preference.
+Specifically, we obtain this model by extrapolating **(alpha = 0.5)** from the weights of the SFT and DPO/RLHF checkpoints, achieving superior alignment with human preference.