diff --git a/index.html b/index.html
index 47a3e5c..79525f5 100644
--- a/index.html
+++ b/index.html
@@ -79,7 +79,7 @@
       <form id="settingsForm" class="text-sm">
         <div class="border-b flex text-xs font-medium"><button type="button" id="tabModel" class="flex-1 py-2 px-3 text-center border-b-2 border-black">Model & Sampling</button><button type="button" id="tabPrompt" class="flex-1 py-2 px-3 text-center border-b-2 border-transparent hover:border-gray-300">System Prompt</button><button type="button" id="tabScript" class="flex-1 py-2 px-3 text-center border-b-2 border-transparent hover:border-gray-300">Script</button></div>
         <div id="panelModel" class="p-4 space-y-4">
-          <div class="grid grid-cols-2 gap-3"><div><label class="block text-gray-700 font-medium mb-1">Model name</label><input id="set_model" type="text" class="w-full rounded-xl border border-gray-300 px-3 py-2" placeholder="openai/gpt-4o"/><p class="mt-1 text-xs text-gray-500">Prefix with or: or oai:</p></div><div><label class="block text-gray-700 font-medium mb-1">Reasoning Effort</label><select id="set_reasoning_effort" class="w-full rounded-xl border border-gray-300 px-3 py-2"><option value="default">Omitted</option><option value="low">Low</option><option value="medium">Medium</option><option value="high">High</option></select><p class="mt-1 text-xs text-gray-500">If supported by the model.</p></div></div>
+          <div class="grid grid-cols-2 gap-3"><div><label class="block text-gray-700 font-medium mb-1">Model name</label><input id="set_model" type="text" class="w-full rounded-xl border border-gray-300 px-3 py-2" placeholder="openai/gpt-5"/><p class="mt-1 text-xs text-gray-500">Optional: prefix with or: or oai:</p></div><div><label class="block text-gray-700 font-medium mb-1">Reasoning Effort</label><select id="set_reasoning_effort" class="w-full rounded-xl border border-gray-300 px-3 py-2"><option value="default">Omitted</option><option value="low">Low</option><option value="medium">Medium</option><option value="high">High</option></select><p class="mt-1 text-xs text-gray-500">If supported by the model.</p></div></div>
           <div class="grid grid-cols-2 gap-3">
             <div><label class="block text-gray-700 font-medium mb-1">Temperature <span class="text-gray-400">(0–2)</span></label><input id="set_temperature" type="number" min="0" max="2" step="0.1" class="w-full rounded-xl border border-gray-300 px-3 py-2" placeholder="1.0"/><p class="mt-1 text-xs text-gray-500">Variety. Lower = predictable.</p></div>
             <div><label class="block text-gray-700 font-medium mb-1">Top P <span class="text-gray-400">(0–1)</span></label><input id="set_top_p" type="number" min="0" max="1" step="0.01" class="w-full rounded-xl border border-gray-300 px-3 py-2" placeholder="1.0"/><p class="mt-1 text-xs text-gray-500">Nucleus sampling.</p></div>