diff --git a/packages/opencode/src/cli/cmd/tui/routes/session/index.tsx b/packages/opencode/src/cli/cmd/tui/routes/session/index.tsx
index 4c5b4eef940e..ab965fa78a37 100644
--- a/packages/opencode/src/cli/cmd/tui/routes/session/index.tsx
+++ b/packages/opencode/src/cli/cmd/tui/routes/session/index.tsx
@@ -1561,15 +1561,17 @@ function ReasoningPart(props: { last: boolean; part: ReasoningPart; message: Ass
   return (
     <Show when={content()}>
       <box id={"text-" + props.part.id} paddingLeft={3} marginTop={1} flexDirection="column" flexShrink={0}>
-        <box onMouseUp={toggle}>
-          <ReasoningHeader
-            toggleable={inMinimal()}
-            open={!inMinimal() || expanded()}
-            done={isDone()}
-            title={summary().title}
-            duration={isDone() ? Locale.duration(duration()) : undefined}
-          />
-        </box>
+        <Show when={!isDone()}>
+          <box onMouseUp={toggle}>
+            <ReasoningHeader
+              toggleable={inMinimal()}
+              open={!inMinimal() || expanded()}
+              done={isDone()}
+              title={summary().title}
+              duration={isDone() ? Locale.duration(duration()) : undefined}
+            />
+          </box>
+        </Show>
         <Show when={(!inMinimal() || expanded()) && summary().body}>
           <box paddingLeft={inMinimal() ? 2 : 0} marginTop={1}>
             <code