Update README.md

README.md

@@ -125,6 +125,8 @@ print(beta_reward)
 ```
 
 ## Evaluation
+### Evaluation Code
+We use codes in [Implicit PRM](https://github.com/PRIME-RL/ImplicitPRM/tree/main/eval) to evaluate the performance of EurusPRM. The reference model is **Qwen2.5-Math-7B-Instruct**. 
 
 ### Evaluation Base Model