diff --git a/apps/web/src/components/chat/MessagesTimeline.tsx b/apps/web/src/components/chat/MessagesTimeline.tsx
index 45940bca888eb2485230b8193e6a98e2e8bca442..6f01fd82116dee792340dd238f5bbfd213165f65 100644
--- a/apps/web/src/components/chat/MessagesTimeline.tsx
+++ b/apps/web/src/components/chat/MessagesTimeline.tsx
@@ -3075,7 +3075,7 @@ const V2SubagentGroup = memo(function V2SubagentGroup({
               {statusSummary}
             </span>
           </span>
-          <span className="shrink-0 font-mono text-3xs text-muted-foreground">
+          <span className="shrink-0 text-xs text-muted-foreground tabular-nums">
             <SubagentElapsed agent={subagentGroupTiming(agents)} />
           </span>
           <ChevronDownIcon
diff --git a/apps/web/src/components/chat/V2LifecycleRow.tsx b/apps/web/src/components/chat/V2LifecycleRow.tsx
index e2506695ca5a918b784ea4035ec1bd33ca95d4b9..cdd469f7acb4902690c0a61ccd0b7d6447c0db69 100644
--- a/apps/web/src/components/chat/V2LifecycleRow.tsx
+++ b/apps/web/src/components/chat/V2LifecycleRow.tsx
@@ -471,7 +471,7 @@ function SubagentTimelineLink(props: {
           )}
         </span>
       </span>
-      <span className="shrink-0 font-mono text-3xs text-muted-foreground/80">
+      <span className="shrink-0 text-xs text-muted-foreground tabular-nums">
         {props.event ? props.event.timestamp : <SubagentElapsed agent={timing} />}
       </span>
       {threadId !== null ? (