diff --git a/codex-rs/tui/src/history_cell.rs b/codex-rs/tui/src/history_cell.rs
index c3003b2b..4f4259aa 100644
--- a/codex-rs/tui/src/history_cell.rs
+++ b/codex-rs/tui/src/history_cell.rs
@@ -139,7 +139,7 @@ impl HistoryCell {
 
     pub(crate) fn new_agent_reasoning(text: String) -> Self {
         let mut lines: Vec<Line<'static>> = Vec::new();
-        lines.push(Line::from("codex reasoning".magenta().italic()));
+        lines.push(Line::from("thinking".magenta().italic()));
         append_markdown(&text, &mut lines);
         lines.push(Line::from(""));