diff --git a/app.py b/app.py
index 5c99d97..c016572 100644
--- a/app.py
+++ b/app.py
@@ -107,6 +107,7 @@ def advanced_options_form() -> None:
                 "model",
                 options=MODELS.for_mode(st.session_state["mode"]),
                 help=f"Learn more about which models are supported [here]({PROJECT_URL})",
+                key="model",
             )
             col2.number_input(
                 "temperature",
@@ -158,10 +159,20 @@ def advanced_options_form() -> None:
                 update_chain()
 
 
+def update_model_on_mode_change():
+    # callback for mode selectbox
+    st.session_state["model"] = MODELS.for_mode(st.session_state["mode"])[0]
+
+
 # Sidebar with Authentication and Advanced Options
 with st.sidebar:
-    mode = st.selectbox("Mode", MODES.all(), key="mode", help=MODE_HELP)
-    st.session_state["model"] = MODELS.for_mode(mode)[0]
+    mode = st.selectbox(
+        "Mode",
+        MODES.all(),
+        key="mode",
+        help=MODE_HELP,
+        on_change=update_model_on_mode_change(),
+    )
     if mode == MODES.LOCAL and not ENABLE_LOCAL_MODE:
         st.error(LOCAL_MODE_DISABLED_HELP, icon=PAGE_ICON)
         st.stop()
diff --git a/datachad/constants.py b/datachad/constants.py
index dc89a55..2a4ee9b 100644
--- a/datachad/constants.py
+++ b/datachad/constants.py
@@ -14,7 +14,7 @@ MAX_TOKENS = 3357
 MODEL_N_CTX = 1000
 
 ENABLE_ADVANCED_OPTIONS = True
-ENABLE_LOCAL_MODE = False
+ENABLE_LOCAL_MODE = True
 
 MODEL_PATH = Path.cwd() / "models"
 GPT4ALL_BINARY = "ggml-gpt4all-j-v1.3-groovy.bin"
diff --git a/datachad/models.py b/datachad/models.py
index 9f3a883..eb960fe 100644
--- a/datachad/models.py
+++ b/datachad/models.py
@@ -82,7 +82,7 @@ def get_model() -> BaseLanguageModel:
                     backend="gptj",
                     temp=st.session_state["temperature"],
                     verbose=True,
-                    callbacks=StreamingStdOutCallbackHandler(),
+                    callbacks=[StreamingStdOutCallbackHandler()],
                 )
             # Added models need to be cased here
             case _default: