diff --git a/chat/index.html b/chat/index.html
index 2a3434a..03806ed 100644
--- a/chat/index.html
+++ b/chat/index.html
@@ -411,7 +411,7 @@
                 sessionId: null,
 
                 models: [
-                    { name: "gpt-5.4-mini", chat: chatWithOpenAI, key: window.env.OPENAI_API_KEY },
+                    { name: "gpt-5.6-luna", chat: chatWithOpenAI, key: window.env.OPENAI_API_KEY },
                     { name: "gemini-3.5-flash-lite", chat: chatWithGemini, key: window.env.GEMINI_API_KEY },
                     { name: "claude-haiku-4-5-20251001", chat: chatWithClaude, key: window.env.ANTHROPIC_API_KEY },
                 ],