tui: only show fast status for gpt-5.4 (#14135)

codex-rs/tui/src/app.rs

@@ -918,8 +918,10 @@ impl App {
         history_cell::SessionHeaderHistoryCell::new(
             self.chat_widget.current_model().to_string(),
             self.chat_widget.current_reasoning_effort(),
-            self.chat_widget
-                .should_show_fast_status(self.chat_widget.current_service_tier()),
+            self.chat_widget.should_show_fast_status(
+                self.chat_widget.current_model(),
+                self.chat_widget.current_service_tier(),
+            ),
             self.config.cwd.clone(),
             version,
         )
@@ -3790,6 +3792,7 @@ mod tests {
     use crate::app_backtrack::BacktrackState;
     use crate::app_backtrack::user_count;
     use crate::chatwidget::tests::make_chatwidget_manual_with_sender;
+    use crate::chatwidget::tests::set_chatgpt_auth;
     use crate::file_search::FileSearchManager;
     use crate::history_cell::AgentMessageCell;
     use crate::history_cell::HistoryCell;
@@ -5463,6 +5466,32 @@ mod tests {
         assert_snapshot!("clear_ui_after_long_transcript_fresh_header_only", rendered);
     }
 
+    #[tokio::test]
+    async fn clear_ui_header_shows_fast_status_only_for_gpt54() {
+        let mut app = make_test_app().await;
+        app.config.cwd = PathBuf::from("/tmp/project");
+        app.chat_widget.set_model("gpt-5.4");
+        app.chat_widget
+            .set_reasoning_effort(Some(ReasoningEffortConfig::XHigh));
+        app.chat_widget
+            .set_service_tier(Some(codex_protocol::config_types::ServiceTier::Fast));
+        set_chatgpt_auth(&mut app.chat_widget);
+
+        let rendered = app
+            .clear_ui_header_lines_with_version(80, "<VERSION>")
+            .iter()
+            .map(|line| {
+                line.spans
+                    .iter()
+                    .map(|span| span.content.as_ref())
+                    .collect::<String>()
+            })
+            .collect::<Vec<_>>()
+            .join("\n");
+
+        assert_snapshot!("clear_ui_header_fast_status_gpt54_only", rendered);
+    }
+
     async fn make_test_app() -> App {
         let (chat_widget, app_event_tx, _rx, _op_rx) = make_chatwidget_manual_with_sender().await;
         let config = chat_widget.config_ref().clone();