Update app/core/model_loader.py

app/core/model_loader.py

@@ -14,8 +14,8 @@ logger = logging.getLogger(__name__)
 STATS_FILE = "usage_stats.json"
 
 # Fixed: Updated to active Groq production model IDs to prevent 404 errors
-DEFAULT_MODEL = "llama-3.1-8b-instant"
-FALLBACK_MODEL = "llama-3.3-70b-versatile"
+DEFAULT_MODEL = "openai/gpt-oss-20b"
+FALLBACK_MODEL = "openai/gpt-oss-120b"
 
 class LLMSingleton:
     _instance = None