Update app.py and requirements.txt

app.py

@@ -1,5 +1,5 @@
 from smolagents import CodeAgent, DuckDuckGoSearchTool, load_tool, tool
-from openai import OpenAI
+from smolagents.models import OpenAIModel
 import datetime
 import requests
 import pytz
@@ -53,12 +53,16 @@ def get_current_time_in_timezone(timezone: str) -> str:
 
 final_answer = FinalAnswerTool()
 
-# Initialize OpenAI model
-client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
-model = client.chat.completions.create(
-    model="gpt-4-turbo-preview",
-    max_tokens=4096,
-    temperature=0.1,
+# Load configuration from agent.json
+with open("agent.json", 'r') as f:
+    config = yaml.safe_load(f)
+
+# Initialize OpenAI model using the configuration
+model = OpenAIModel(
+    model=config["model"]["data"]["model_id"],
+    max_tokens=config["model"]["data"]["max_tokens"],
+    temperature=config["model"]["data"]["temperature"],
+    api_key=os.getenv("OPENAI_API_KEY")
 )
 
 # Import tool from Hub