Update app.py

app.py

@@ -19,7 +19,7 @@ conversational_models = {
     "Perplexity (R1 Post-trained)": "perplexity-ai/r1-1776",
     "Llama-Instruct by Meta": "meta-llama/Llama-3.2-3B-Instruct",
     "Mistral": "mistralai/Mistral-7B-v0.1",
-    "Gemma": "google/gemma-2-2b-it",
+    "Gemma": "google/gemma-3-27b-it",
 }
 
 # Define a dictionary of Text-to-Image models