eos token return fix

llms/mlx_lm/tuner/grpo_trainer.py

@@ -225,6 +225,11 @@ def generate_grpo(
                     )
                 ):
                     print(token)
+
+                    # Check for EOS token
+                    if token == tokenizer.eos_token_id:
+                        break
+                    
                     current_tokens.append(token)
 
                     # Check for end token
@@ -233,10 +238,6 @@ def generate_grpo(
                     ):
                         break
 
-                    # Check for EOS token
-                    if token == tokenizer.eos_token_id:
-                        break
-
                     # Check if we've reached the maximum number of tokens
                     if i >= max_tokens - 1:
                         break
@@ -305,7 +306,6 @@ def grpo_loss(
     max_tokens: int = 64,
     temperature: float = 0.8,
     reward_weights: Optional[List[float]] = None,
-    is_validation: bool = False,
     batch_size: int = 1,
 ):
     prompt_tokens, _, prompt_text, answer_text = batch
@@ -366,7 +366,7 @@ def grpo_loss(
             continue
 
     # Restore original training state if we're not in validation mode
-    if not is_validation and was_training:
+    if was_training:
         model.train()
     mx.metal.clear_cache()
 
@@ -712,8 +712,7 @@ def evaluate_grpo(
             epsilon=epsilon,
             ref_model=ref_model,
             temperature=temperature,
-            max_tokens=max_tokens,
-            is_validation=True,
+            max_tokens=max_tokens
         )
 
         all_losses += losses * toks