Update requirements.txt

requirements.txt

@@ -1,5 +1,5 @@
-# Core dependencies for Hugging Face Spaces (Python 3.10 compatible)
-gradio==4.20.0
+# Core dependencies for Hugging Face Spaces
+gradio==4.44.0
 pandas==2.2.3
 numpy==1.26.4
 matplotlib==3.10.3
@@ -13,6 +13,8 @@ langgraph
 langchain
 langchain-core
 langchain-community
+langchain-openai
+langchain-anthropic
 
 # Additional data processing
 scipy==1.13.1
@@ -23,6 +25,9 @@ openpyxl==3.1.5
 requests==2.32.4
 aiohttp==3.12.14
 
+# Environment variables
+python-dotenv
+
 # Daytona sandbox
 daytona