diff --git a/ai-hub/app/core/providers/tts/gemini.py b/ai-hub/app/core/providers/tts/gemini.py
index 8e6e32b..617c3df 100644
--- a/ai-hub/app/core/providers/tts/gemini.py
+++ b/ai-hub/app/core/providers/tts/gemini.py
@@ -39,8 +39,19 @@
     def __init__(self, api_key: str, model_name: str = "",
                  voice_name: str = "Kore", **kwargs):
         from app.config import settings
-        raw_model = model_name or settings.TTS_MODEL_NAME
+        raw_model = model_name or settings.TTS_MODEL_NAME or "models/gemini-1.5-flash"
+        
+        # Ensure raw_model is a string to prevent 'NoneType' attribute errors
+        if not isinstance(raw_model, str):
+            raw_model = "models/gemini-1.5-flash"
+            
         model_id = raw_model.split("/")[-1]
+        
+        # Strip redundant '-tts' suffix if present (common typo)
+        if model_id.endswith("-tts"):
+            model_id = model_id[:-4]
+            
+        self.model_name = model_id
 
         # Route to Vertex AI ONLY when the key is a Vertex service-account key (starting with "AQ.")
         # AI Studio keys start with "AIza" and must use the generativelanguage endpoint.