Update app.py

app.py

@@ -139,10 +139,9 @@ if __name__ == "__main__":
 # Available models
 MODELS = [
     "google/gemma-3-27b-it",
-    "mistralai/mixtral-8x7b-instruct",
+    "mistralai/mistral-medium",
     "meta-llama/llama-3.1-70b-instruct",
     "anthropic/claude-3.5-haiku",
-    "nvidia/nemotron-4-340b-instruct",
     "openai/gpt-3.5-turbo"
 ]
 
@@ -230,13 +229,7 @@ pinned: false
 5. Value: Your OpenRouter API key
 6. Click "Add"
 
-### Step 4: Get Your API Key
-1. Go to https://openrouter.ai/keys
-2. Sign up/login if needed
-3. Click "Create Key"
-4. Copy the key (starts with `sk-or-`)
-
-### Step 5: Test Your Space
+### Step 4: Test Your Space
 - Go back to "App" tab
 - Your Space should be running!
 - Try the example prompts or ask a question
@@ -248,17 +241,6 @@ pinned: false
 - **Max Tokens**: {config['max_tokens']}
 - **API Key Variable**: {config['api_key_var']}
 
-## Cost Information
-
-OpenRouter charges per token used:
-- Gemma 2 9B: ~$0.20 per million tokens
-- Claude Haiku: ~$0.25 per million tokens  
-- GPT-4o-mini: ~$0.60 per million tokens
-
-Typical conversation: ~300 tokens (cost: $0.00006 - $0.0018)
-
-Check current pricing: https://openrouter.ai/models
-
 ## Customization
 
 To modify your Space: