diff --git a/llm_vlm_api.py b/llm_vlm_api.py
index 7d369f8..537cf1c 100644
--- a/llm_vlm_api.py
+++ b/llm_vlm_api.py
@@ -12,10 +12,10 @@ class LLM_VLM_API:
                 "base_url": ("STRING", {"default": ""}),
                 "api_key": ("STRING", {"default": ""}),
                 "model": ("STRING", {"default": ""}),
+                "temperature": ("FLOAT", {"default": 0.7, "min": 0.0, "max": 2.0, "step": 0.01}),
+                "max_tokens": ("INT", {"default": 4096, "min": 1, "max": 8192, "step": 1}),
             },
             "optional": {
-                "temperature": ("FLOAT", {"forceInput": True}),
-                "max_tokens": ("INT", {"forceInput": True}),
                 "image": ("IMAGE",),
                 "system prompt": ("STRING", {"forceInput": True}),
                 "text": ("STRING", {"forceInput": True}),
@@ -27,12 +27,10 @@ class LLM_VLM_API:
     FUNCTION = "execute"
     CATEGORY = "LLM(VLM) API"
 
-    def execute(self, base_url, api_key, model, **kwargs):
+    def execute(self, base_url, api_key, model, temperature, max_tokens, **kwargs):
         system_prompt = kwargs.get("system prompt", None)
         image = kwargs.get("image", None)
         text = kwargs.get("text", None)
-        temperature = kwargs.get("temperature", None)
-        max_tokens = kwargs.get("max_tokens", None)
 
         if not text and image is None:
             return ("Error: No text or image provided.",)
@@ -54,23 +52,19 @@ class LLM_VLM_API:
 
         client = OpenAI(api_key=api_key, base_url=base_url)
 
-        api_params = {
-            "model": model,
-            "messages": []
-        }
-        
-        if temperature is not None:
-            api_params["temperature"] = temperature
-        if max_tokens is not None:
-            api_params["max_tokens"] = max_tokens
-
         try:
+            messages = []
             if system_prompt:
-                api_params["messages"].append({"role": "system", "content": system_prompt})
+                messages.append({"role": "system", "content": system_prompt})
             
-            api_params["messages"].append({"role": "user", "content": content})
+            messages.append({"role": "user", "content": content})
 
-            resp = client.chat.completions.create(**api_params)
+            resp = client.chat.completions.create(
+                model=model,
+                temperature=temperature,
+                max_tokens=max_tokens,
+                messages=messages
+            )
             result = resp.choices[0].message.content
         except Exception as e:
             result = str(e)