fixed situation where there was no default model listed

installer/client/cli/utils.py

@@ -49,11 +49,7 @@ class Standalone:
         self.args = args
         self.model = getattr(args, 'model', None)
         if not self.model:
-            try:
-                self.model = os.environ.get(
-                    "DEFAULT_MODEL")
-            except KeyError:
-                self.model = 'gpt-4-turbo-preview'
+            self.model = 'gpt-4-turbo-preview'
         self.claude = False
         sorted_gpt_models, ollamaList, claudeList = self.fetch_available_models()
         self.local = self.model in ollamaList