diff --git a/frontend/src/components/markdown.tsx b/frontend/src/components/markdown.tsx
index 67058d6be..f7924e899 100644
--- a/frontend/src/components/markdown.tsx
+++ b/frontend/src/components/markdown.tsx
@@ -176,6 +176,18 @@ function parseThinkingTags(content: string, isComplete: boolean = false): Parsed
   return parts;
 }
 
+export function stripThinkingTags(content: string): string {
+  return (
+    parseThinkingTags(content, true) // leverage single source of truth
+      .filter((p) => p.type === "content")
+      .map((p) => p.content)
+      .join("")
+      // collapse ≥3 consecutive blank lines to two
+      .replace(/\n{3,}/g, "\n\n")
+      .trim()
+  );
+}
+
 export function PreCode(props: JSX.IntrinsicElements["pre"]) {
   const ref = useRef<HTMLPreElement>(null);
 
diff --git a/frontend/src/routes/_auth.chat.$chatId.tsx b/frontend/src/routes/_auth.chat.$chatId.tsx
index 115363fc7..c30799001 100644
--- a/frontend/src/routes/_auth.chat.$chatId.tsx
+++ b/frontend/src/routes/_auth.chat.$chatId.tsx
@@ -4,7 +4,7 @@ import { AsteriskIcon, Check, Copy, UserIcon, ChevronDown, SquarePenIcon } from
 import ChatBox from "@/components/ChatBox";
 import { useOpenAI } from "@/ai/useOpenAi";
 import { useLocalState } from "@/state/useLocalState";
-import { Markdown } from "@/components/markdown";
+import { Markdown, stripThinkingTags } from "@/components/markdown";
 import { ChatMessage, Chat, DEFAULT_MODEL_ID } from "@/state/LocalStateContext";
 import { AlertDestructive } from "@/components/AlertDestructive";
 import { Sidebar, SidebarToggle } from "@/components/Sidebar";
@@ -46,7 +46,8 @@ function SystemMessage({
 
   const handleCopy = useCallback(async () => {
     try {
-      await navigator.clipboard.writeText(text);
+      const textWithoutThinking = stripThinkingTags(text);
+      await navigator.clipboard.writeText(textWithoutThinking);
       setIsCopied(true);
       setTimeout(() => setIsCopied(false), 2000);
     } catch (error) {