Update learning_platform.py

learning_platform.py

@@ -36,7 +36,7 @@ class LearningPath:
 class LLMService:
     def __init__(self, api_key: str):
         self.client = AsyncOpenAI(api_key=api_key)
-        self.model = "gpt-4"
+        self.model = "gpt-4o"
         
     async def generate(self, prompt: str, temperature: float = 1.0) -> str:
         try: