Update app.py

app.py

@@ -102,7 +102,7 @@ def load_models():
         # Load SentenceTransformer with offline handling
         try:
             from sentence_transformers import SentenceTransformer
-            model_name = 'deepseek-ai/DeepSeek-R1-Distill-Qwen-7B'
+            model_name = 'deepseek-ai/DeepSeek-R1-Distill-Qwen-1.5B'
             cache_dir = os.path.expanduser('~/.cache/torch/sentence_transformers')
             if os.path.exists(os.path.join(cache_dir, model_name)):
                 semantic_model = SentenceTransformer(os.path.join(cache_dir, model_name))