Update agent.py

agent.py

@@ -159,7 +159,7 @@ tools = [
 ]
 
 # Build graph function
-def build_graph(provider: str = "google"):
+def build_graph(provider: str = "openai"):
     """Build the graph"""
     # Load environment variables from .env file
     if provider == "google":
@@ -170,7 +170,7 @@ def build_graph(provider: str = "google"):
         llm = ChatGroq(model="qwen-qwq-32b", temperature=0) # optional : qwen-qwq-32b gemma2-9b-it
     elif provider == "openai":
         # OpenAI
-        llm = ChatOpenAI(model="gpt-4", temperature=0)
+        llm = ChatOpenAI(model="gpt-4o-mini", temperature=0)
     elif provider == "huggingface":
         llm = ChatHuggingFace(
             llm=HuggingFaceEndpoint(