diff --git a/src/apps/officer-web/Screens/Dashboard/ChatHistory/Screen.tsx b/src/apps/officer-web/Screens/Dashboard/ChatHistory/Screen.tsx
index c54c7e3f..b1e0cf5b 100644
--- a/src/apps/officer-web/Screens/Dashboard/ChatHistory/Screen.tsx
+++ b/src/apps/officer-web/Screens/Dashboard/ChatHistory/Screen.tsx
@@ -94,7 +94,7 @@ export const SessionList = () => {
                   </div>
                   {session.model && (
                     <div className="text-xs text-duck-teal/70 dark:text-duck-teal/60 truncate">
-                      {session.model}
+                      {session.model.includes('/') ? session.model.replace('/', ' - ') : session.model}
                     </div>
                   )}
                 </div>
diff --git a/src/apps/officer-web/Screens/Dashboard/ChatHistory/Widget.tsx b/src/apps/officer-web/Screens/Dashboard/ChatHistory/Widget.tsx
index 7e66c84a..67d86784 100644
--- a/src/apps/officer-web/Screens/Dashboard/ChatHistory/Widget.tsx
+++ b/src/apps/officer-web/Screens/Dashboard/ChatHistory/Widget.tsx
@@ -40,7 +40,7 @@ export const ChatHistory = () => {
                     </span>
                     {session.model && (
                       <span className="text-xs text-duck-teal/70 dark:text-duck-teal/60 truncate block">
-                        {session.model}
+                        {session.model.includes('/') ? session.model.replace('/', ' - ') : session.model}
                       </span>
                     )}
                   </div>
diff --git a/src/servers/api/chat-types.ts b/src/servers/api/chat-types.ts
index 37911ec4..fc8ade6a 100644
--- a/src/servers/api/chat-types.ts
+++ b/src/servers/api/chat-types.ts
@@ -25,7 +25,7 @@ export type ClientMessage =
 
 // Server → Client
 export type ServerMessage =
-  | { type: 'session:init'; sessionId: string; model: string }
+  | { type: 'session:init'; sessionId: string; model: string | null }
   | { type: 'system:prompt'; text: string }
   | { type: 'assistant:text'; text: string }
   | { type: 'assistant:partial'; text: string }
diff --git a/src/servers/api/pi-mono/websocket.ts b/src/servers/api/pi-mono/websocket.ts
index 1c4a68d9..6b7761e1 100644
--- a/src/servers/api/pi-mono/websocket.ts
+++ b/src/servers/api/pi-mono/websocket.ts
@@ -464,11 +464,11 @@ async function handleChat({
     const pendingTitle = prompt.slice(0, 100);
 
     // Send session:init AFTER attaching ws so the pi process survives the reconnect
-    send(ws, { type: 'session:init', sessionId: sid, model: model ?? 'pi-mono' });
+    send(ws, { type: 'session:init', sessionId: sid, model: model ?? null });
 
     if (session.resourceChatDir) {
       const chatDir = join(session.resourceChatDir, 'chat');
-      const meta = { id: sid, model: model ?? 'pi-mono' };
+      const meta = { id: sid, model: model ?? null };
       mkdir(chatDir, { recursive: true })
         .then(() => Bun.write(join(chatDir, 'meta.json'), JSON.stringify(meta)))
         .catch(() => {});
@@ -478,7 +478,7 @@ async function handleChat({
         id: sid,
         title: pendingTitle,
         createdAt: Date.now(),
-        model: model ?? 'pi-mono',
+        model: model ?? null,
       };
       mkdir(dir, { recursive: true })
         .then(() => Bun.write(join(dir, 'meta.json'), JSON.stringify(meta)))
diff --git a/src/workspaces/apps/Chat/types.ts b/src/workspaces/apps/Chat/types.ts
index 28169974..47696b5d 100644
--- a/src/workspaces/apps/Chat/types.ts
+++ b/src/workspaces/apps/Chat/types.ts
@@ -29,7 +29,7 @@ export type TaskInfo = {
 };
 
 export type ServerMessage =
-  | { type: 'session:init'; sessionId: string; model: string }
+  | { type: 'session:init'; sessionId: string; model: string | null }
   | { type: 'system:prompt'; text: string }
   | { type: 'assistant:text'; text: string }
   | { type: 'assistant:partial'; text: string }