Update app.py

app.py

@@ -19,7 +19,7 @@ from sentence_transformers import SentenceTransformer
 
 # ========================= CONSTANTS =========================
 EMBED_MODEL_NAME = "paraphrase-multilingual-MiniLM-L12-v2"  # Arabic + English, 384-dim
-LLM_MODEL_NAME = "llama-3.3-70b-versatile"
+LLM_MODEL_NAME = "openai/gpt-oss-120b"
 CHUNK_WORDS = 80          # stays under the embedding model's 128-token limit
 CHUNK_OVERLAP = 15
 TABLE_CHUNK_WORDS = 60    # table/spreadsheet rows are token-heavy, so smaller groups