Use gpt 4.1 with search

lib/music_library/record_chat.ex

@@ -2,16 +2,12 @@ defmodule MusicLibrary.RecordChat do
   alias MusicLibrary.Records.Record
 
   def stream_response(messages, record, embedding_text, callback) do
-    system_prompt = build_system_prompt(record, embedding_text)
+    instructions = build_instructions(record, embedding_text)
 
-    full_messages = [
-      %{role: "system", content: system_prompt} | messages
-    ]
-
-    OpenAI.chat_stream(full_messages, on_chunk: callback)
+    OpenAI.chat_stream(messages, on_chunk: callback, instructions: instructions)
   end
 
-  defp build_system_prompt(%Record{} = record, embedding_text) do
+  defp build_instructions(%Record{} = record, embedding_text) do
     context =
       case embedding_text do
         nil -> basic_context(record)
@@ -21,8 +17,9 @@ defmodule MusicLibrary.RecordChat do
 
     """
     You are a knowledgeable music assistant. Answer questions about the album \
-    the user is currently viewing. Use the provided information as your primary \
-    reference. Be concise and accurate. When unsure, say so.
+    the user is currently viewing. Use the provided album information as your \
+    primary reference, and use web search to find additional up-to-date \
+    information when helpful. Be concise and accurate. When unsure, say so.
 
     Album information:
     #{context}