synthesis model is now gpt-4.1-mini, it's cheaper and better than 4o-mini

app.py

@@ -116,7 +116,7 @@ with st.sidebar:
 
             st.session_state.expert_model = st.selectbox(
                 "Choose the LLM model",
-                ["LLaMA-TOMMI-1.0-11B", "LLaMA-3.2-11B", "gpt-4o-mini"],
+                ["LLaMA-TOMMI-1.0-11B", "LLaMA-3.2-11B", "gpt-4.1-mini"],
                 index=0,
                 key='a1model'
             )
@@ -142,7 +142,7 @@ with st.sidebar:
         show_yt_context = st.toggle("Show retrieved video content", value=False)
         st.session_state.synthesis_model = st.selectbox(
             "Choose the LLM model",
-            ["LLaMA-3.2-3B","gpt-4o-mini", "gpt-4.1-mini", "gpt-4.1-nano"], # "LLaMA-3.2-11B", 
+            ["LLaMA-3.2-3B", "gpt-4.1-mini"], # "LLaMA-3.2-11B", 
             index=1,
             key='a2model'
         )