[Update] Default LLM (#3587)

docs/open-source/features/async-memory.mdx

@@ -202,7 +202,7 @@ async def chat_with_memories(message: str, user_id: str = "default_user") -> str
         # Generate assistant response
         system_prompt = f"You are a helpful AI. Answer the question based on query and memories.\nUser Memories:\n{memories_str}"
         messages = [{"role": "system", "content": system_prompt}, {"role": "user", "content": message}]
-        response = await async_openai_client.chat.completions.create(model="gpt-4o-mini", messages=messages)
+        response = await async_openai_client.chat.completions.create(model="gpt-4.1-nano-2025-04-14", messages=messages)
         assistant_response = response.choices[0].message.content
 
         # Create new memories from the conversation
@@ -249,7 +249,7 @@ async def handle_initialization_errors():
         # Initialize with custom config
         config = MemoryConfig(
             vector_store={"provider": "chroma", "config": {"path": "./chroma_db"}},
-            llm={"provider": "openai", "config": {"model": "gpt-4o-mini"}}
+            llm={"provider": "openai", "config": {"model": "gpt-4.1-nano-2025-04-14"}}
         )
         memory = AsyncMemory(config=config)
         print("AsyncMemory initialized successfully")