diff --git a/ktransformers/server/api/openai/legacy/completions.py b/ktransformers/server/api/openai/legacy/completions.py
index fe250f4..9808c3a 100644
--- a/ktransformers/server/api/openai/legacy/completions.py
+++ b/ktransformers/server/api/openai/legacy/completions.py
@@ -20,7 +20,7 @@ async def create_completion(request:Request,create:CompletionCreate):
 
     if create.stream:
         async def inner():
-            async for token in interface.inference(create.prompt,id,create.temperature,create.top_p):     
+            async for token in interface.inference(create.prompt,id,create.temperature,create.top_p,create.repetition_penalty):     
                 d = {'choices':[{'delta':{'content':token}}]}
                 yield f"data:{json.dumps(d)}\n\n"
             d = {'choices':[{'delta':{'content':''},'finish_reason':''}]}
@@ -28,6 +28,6 @@ async def create_completion(request:Request,create:CompletionCreate):
         return stream_response(request,inner())
     else:
         comp = CompletionObject(id=id,object='text_completion',created=int(time()))
-        async for token in interface.inference(create.prompt,id,create.temperature,create.top_p):     
+        async for token in interface.inference(create.prompt,id,create.temperature,create.top_p,create.repetition_penalty):     
             comp.append_token(token)
         return comp
diff --git a/ktransformers/server/backend/interfaces/transformers.py b/ktransformers/server/backend/interfaces/transformers.py
index d2e48a4..2674dd1 100644
--- a/ktransformers/server/backend/interfaces/transformers.py
+++ b/ktransformers/server/backend/interfaces/transformers.py
@@ -202,18 +202,20 @@ class TransformersInterface(BackendInterfaceBase):
         self.seq_length += 1
         return self.streamer.put(new_tokens)
 
-    def prepare_logits_wrapper(self, inputs, device, temperature: Optional[float] = None, top_p: Optional[float] = None):
+    def prepare_logits_wrapper(self, inputs, device, temperature: Optional[float] = None, top_p: Optional[float] = None, repetition_penalty: Optional[float] = None):
         if temperature is None:
             temperature = self.args.temperature
         if top_p is None:
             top_p = self.args.top_p
+        if repetition_penalty is None:
+            repetition_penalty = self.args.repetition_penalty
         generation_config, model_kwargs = self.model._prepare_generation_config(
             None, max_length=self.args.max_new_tokens,
             do_sample=True, 
             top_k=self.args.top_k, 
             top_p=top_p, 
             temperature=temperature,
-            repetition_penalty=self.args.repetition_penalty # change this to modify generate config
+            repetition_penalty=repetition_penalty # change this to modify generate config
         )
         self.inputs = inputs
         self.generation_config = generation_config
@@ -259,7 +261,7 @@ class TransformersInterface(BackendInterfaceBase):
         return self.logits_to_token(logits)
 
     @torch.no_grad
-    def prefill(self, input_ids: torch.Tensor, is_new: bool, temperature: Optional[float] = None, top_p: Optional[float] = None):
+    def prefill(self, input_ids: torch.Tensor, is_new: bool, temperature: Optional[float] = None, top_p: Optional[float] = None, repetition_penalty: Optional[float] = None):
         input_ids_length = input_ids.shape[-1]
         logger.debug(f"input_ids: {input_ids.shape}")
 
@@ -327,7 +329,7 @@ class TransformersInterface(BackendInterfaceBase):
         else:
             logits = self.model(inputs_embeds=inputs_embeds, return_dict=False)[0]
 
-        self.prepare_logits_wrapper(input_ids, device, temperature, top_p)
+        self.prepare_logits_wrapper(input_ids, device, temperature, top_p, repetition_penalty)
         next_token = self.logits_to_token(logits[0, -1, :])
         yield self.append_new_tokens(next_token)
 
@@ -363,7 +365,7 @@ class TransformersInterface(BackendInterfaceBase):
                 self.last_request_id = thread_id
                 return True
 
-    async def inference(self, local_messages, thread_id: str, temperature: Optional[float] = None, top_p: Optional[float] = None):
+    async def inference(self, local_messages, thread_id: str, temperature: Optional[float] = None, top_p: Optional[float] = None, repetition_penalty: Optional[float] = None):
         self.streamer.reset()
         self.profiler.create_and_start_timer("tokenize")
         if isinstance(local_messages, List):
@@ -390,7 +392,7 @@ class TransformersInterface(BackendInterfaceBase):
             print(think, end="",flush=True)
             yield think
         
-        for t in self.prefill(input_ids, self.check_is_new(thread_id), temperature, top_p):
+        for t in self.prefill(input_ids, self.check_is_new(thread_id), temperature, top_p, repetition_penalty):
             # output think token after prefill done
             if t is not None:
                 print(t, end="",flush=True)
diff --git a/ktransformers/server/schemas/legacy/completions.py b/ktransformers/server/schemas/legacy/completions.py
index 7be0404..c5876d4 100644
--- a/ktransformers/server/schemas/legacy/completions.py
+++ b/ktransformers/server/schemas/legacy/completions.py
@@ -11,6 +11,7 @@ class CompletionCreate(BaseModel):
     stream: bool = False
     temperature: Optional[float]
     top_p: Optional[float]
+    repetition_penalty: Optional[float]
 
     def get_tokenizer_messages(self):
         if isinstance(self.prompt,List):