diff --git a/.gitignore b/.gitignore
index 26740c5..eb58011 100755
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,8 @@ demo/indices/
 outputs/
 *.pkl
 *.pdf
+*.idx 
+*.map
 .history/
 scripts/
 lm_eval.egg-info/
diff --git a/examples/google_history_reader_leann.py b/examples/google_history_reader_leann.py
index 2c7c7a8..f8acf90 100644
--- a/examples/google_history_reader_leann.py
+++ b/examples/google_history_reader_leann.py
@@ -198,7 +198,16 @@ async def query_leann_index(index_path: str, query: str):
         top_k=5, 
         recompute_beighbor_embeddings=True,
         complexity=128,
-        beam_width=1
+        beam_width=1,
+        llm_config={
+            "type": "openai",
+            "model": "gpt-4o",
+            "api_key": os.getenv("OPENAI_API_KEY"),
+        },
+        llm_kwargs={
+            "temperature": 0.0,
+            "max_tokens": 1000
+        }
     )
     print(f"Leann: {chat_response}")
 
@@ -206,7 +215,7 @@ async def main():
     # Default Chrome profile path
     default_chrome_profile = os.path.expanduser("~/Library/Application Support/Google/Chrome/Default")
     
-    INDEX_DIR = Path("./chrome_history_index_leann")
+    INDEX_DIR = Path("./chrome_history_index_leann_test")
     INDEX_PATH = str(INDEX_DIR / "chrome_history.leann")
     
     # Find all Chrome profile directories
diff --git a/packages/leann-core/src/leann/api.py b/packages/leann-core/src/leann/api.py
index 2e90d8d..b8f2783 100644
--- a/packages/leann-core/src/leann/api.py
+++ b/packages/leann-core/src/leann/api.py
@@ -39,7 +39,8 @@ def compute_embeddings(chunks: List[str], model_name: str) -> np.ndarray:
         model = model.to("mps")
 
     # Generate embeddings
-    embeddings = model.encode(chunks, convert_to_numpy=True, show_progress_bar=True, batch_size=64)
+    # give use an warning if OOM here means we need to turn down the batch size
+    embeddings = model.encode(chunks, convert_to_numpy=True, show_progress_bar=True, batch_size=256)
 
     return embeddings
 
diff --git a/packages/leann-core/src/leann/chat.py b/packages/leann-core/src/leann/chat.py
index df83a57..47b6e41 100644
--- a/packages/leann-core/src/leann/chat.py
+++ b/packages/leann-core/src/leann/chat.py
@@ -209,10 +209,13 @@ def get_llm(llm_config: Optional[Dict[str, Any]] = None) -> LLMInterface:
         An instance of an LLMInterface subclass.
     """
     if llm_config is None:
-        logger.info("No LLM config provided, defaulting to simulated chat.")
-        return SimulatedChat()
+        llm_config = {
+            "type": "openai",
+            "model": "gpt-4o",
+            "api_key": os.getenv("OPENAI_API_KEY")
+        }
 
-    llm_type = llm_config.get("type", "simulated")
+    llm_type = llm_config.get("type", "openai")
     model = llm_config.get("model")
     
     logger.info(f"Attempting to create LLM of type='{llm_type}' with model='{model}'")