diff --git a/energon/engine/gpt_pipeline_wrapper.py b/energon/engine/gpt_pipeline_wrapper.py
index c1e8bb5..e78359b 100644
--- a/energon/engine/gpt_pipeline_wrapper.py
+++ b/energon/engine/gpt_pipeline_wrapper.py
@@ -24,18 +24,12 @@ def __init__(self,
         self.model = model
         self.dtype = dtype
 
-        # input
-        self.static_input = dict()
-        self.static_name = []
-        self.comm_input = dict()
-        self.comm_name = None        
-
         # get the hidden_size
         input_ids = torch.randint(1, 10, (max_batch_size, 512), dtype=torch.int64).cuda()
         attention_mask = torch.randint(0, 1, (max_batch_size, 1, 512), dtype=torch.int64).cuda()
         hidden_states = None
         self.sample = dict(hidden_states=hidden_states, input_ids=input_ids, attention_mask=attention_mask)
-        self._init_input()
+        
         self.tensor_dim = 0
         self.hidden_size = 0
         self.max_batch_size = max_batch_size
@@ -47,25 +41,13 @@ def __init__(self,
         self.lock = threading.Lock()
         self.key = CircleInt()
 
-    def _init_input(self):
-
-        sig = inspect.signature(self.model.forward)
-        parameters = sig.parameters # dict
-        for name, _ in parameters.items():
-            if self.sample[name] is not None:
-                self.static_input[name] = self.sample[name]
-                self.static_name.append(name)
-            else:
-                self.comm_input[name] = None
-                self.comm_name = name
-
 
     def _init_tensor_meta(self):   
         
         with torch.inference_mode():
             recv_tensor_shape = None
             if gpc.is_first_rank(ParallelMode.PIPELINE):
-                output = self.model(**self.comm_input, **self.static_input) # ([32, 512, 1600])
+                output = self.model(hidden_states = None, input_ids=self.sample['input_ids'], attention_mask = self.sample['attention_mask']) # ([32, 512, 1600])
                 send_tensor_meta(output)
                 send_forward(output)
                 self.tensor_dim = output.dim()
@@ -80,8 +62,7 @@ def _init_tensor_meta(self):
                 input_tensor = recv_forward(recv_tensor_shape, dtype=self.dtype) # only a tensor now
                 self.tensor_dim = input_tensor.dim()
                 self.hidden_size = input_tensor.size()[-1]
-                self.comm_input[self.comm_name] = input_tensor
-                output = self.model(**self.comm_input, **self.static_input)
+                output = self.model(hidden_states = None, input_ids=input_tensor, attention_mask = self.sample['attention_mask'])
                 send_tensor_meta(output)
                 send_forward(output)
 
@@ -96,23 +77,24 @@ def fill_meta_tensor(self, inputs, pipe_meta):
         pipe_meta.get_meta_tensor()[3] = self.hidden_size
         pipe_meta.update_meta()
 
-    def run(self, key, inputs):        
+    def run(self, key, inputs):
         pipe_meta = PipelineMeta(self.tensor_dim, self.max_batch_size)
         self.fill_meta_tensor(inputs, pipe_meta)
         self.pipe_msg_queue.enqueue(key, inputs, pipe_meta)
         
         self.lock.acquire()
-        sample, pipe_meta = self.pipe_msg_queue.top(self.key.val)
+        cur_key = self.key.val
+        sample, pipe_meta = self.pipe_msg_queue.top(cur_key)
         self.key.addOne()
 
-        for name in self.static_name:
-            self.static_input[name] = sample[name]
-
         with torch.inference_mode():
 
             if gpc.is_first_rank(ParallelMode.PIPELINE):
 
-                output = self.model(**self.comm_input, **self.static_input)
+                output = self.model(hidden_states = None, 
+                                    input_ids = sample['input_ids'], 
+                                    attention_mask = sample['attention_mask'])
+
                 send_forward(output)
                 self.lock.release()
                 return None
@@ -121,17 +103,18 @@ def run(self, key, inputs):
 
                 # print(f'get_tensor_shapes:{pipe_meta.get_tensor_shapes()}')
                 input_tensor = recv_forward(pipe_meta.get_tensor_shapes(), dtype=self.dtype)
-                # print(f'input_tensor.shape:{input_tensor.shape}')
-                self.comm_input[self.comm_name] = input_tensor
-                output = self.model(**self.comm_input, **self.static_input)
+                output = self.model(hidden_states = input_tensor, 
+                                    input_ids = sample['input_ids'], 
+                                    attention_mask = sample['attention_mask'])
                 self.lock.release()
-                return output
+                return output, cur_key
 
             else:
                 
                 input_tensor = recv_forward(pipe_meta.get_tensor_shapes(), dtype=self.dtype)
-                self.comm_input[self.comm_name] = input_tensor
-                output = self.model(**self.comm_input, **self.static_input)
+                output = self.model(hidden_states = input_tensor, 
+                                    input_ids = sample['input_ids'], 
+                                    attention_mask = sample['attention_mask'])
                 send_forward(output)
                 self.lock.release()
                 return None
diff --git a/energon/engine/pipeline_msg_dict.py b/energon/engine/pipeline_msg_dict.py
index 2086baa..d0aa122 100644
--- a/energon/engine/pipeline_msg_dict.py
+++ b/energon/engine/pipeline_msg_dict.py
@@ -37,7 +37,7 @@ def top(self, key):
         while key not in self.pipeline_msg_dict:
             time.sleep(0.002)
 
-        pipe_msg = self.pipeline_msg_dict[key]
+        pipe_msg = self.pipeline_msg_dict.pop(key)
 
         return pipe_msg.sample, pipe_msg.pipe_meta
 
diff --git a/energon/engine/rpc_worker.py b/energon/engine/rpc_worker.py
index 3e0c118..2568524 100644
--- a/energon/engine/rpc_worker.py
+++ b/energon/engine/rpc_worker.py
@@ -25,7 +25,7 @@ def enqueue(self, key, output):
     def top(self, key):
         while key not in self.rd:
             time.sleep(0.001)
-        output = self.rd[key]
+        output = self.rd.pop(key)
         return output
 
 class RPCWorker: