Update README.md

README.md

@@ -4,7 +4,7 @@ emoji: 🤖
 colorFrom: blue
 colorTo: green
 sdk: streamlit
-sdk_version: 1.42.2
+sdk_version: 1.24.0
 app_file: app.py
 pinned: false
 ---
@@ -24,6 +24,11 @@ A sophisticated Streamlit app that mimics the ChatGPT interface, using OpenAI's
   - Create new chats
   - Switch between conversations
   - Delete old conversations
+- **Model selection** - choose between different OpenAI models:
+  - GPT-3.5-Turbo (default)
+  - GPT-4
+  - GPT-3.5-Turbo-16k (for longer conversations)
+  - GPT-4-Turbo
 - **Conversation history** preserved between sessions
 - **Demo mode** that works without an API key
 - **Responsive design** that adapts to different screen sizes
@@ -84,12 +89,19 @@ The app will automatically deploy and be available at your Hugging Face Spaces U
 
 ## About the Model
 
-This app uses OpenAI's GPT-3.5-Turbo model, which is a powerful language model with excellent reasoning capabilities. You'll need an OpenAI API key to access this model.
+This app lets you select from multiple OpenAI models:
+
+- **GPT-3.5-Turbo**: Fast and cost-effective, suitable for most tasks
+- **GPT-4**: More capable but slower and more expensive
+- **GPT-3.5-Turbo-16k**: Supports longer conversations with extended context window
+- **GPT-4-Turbo**: OpenAI's most advanced model with significantly larger context window
+
+You can select your preferred model in the sidebar. Note that model availability depends on your OpenAI API key permissions and subscription tier.
 
 ## Customization
 
 You can easily customize the app by:
-- Changing the model in the `get_ai_response` function
+- Changing the model parameters in the `AVAILABLE_MODELS` dictionary
 - Adjusting the styling in the CSS section
 - Adding more features to the sidebar
-- Creating additional response templates for the demo mode
+- Creating additional response templates for the demo mode