diff --git a/packages/dashboard/app/components/ChatView.css b/packages/dashboard/app/components/ChatView.css
index 2421a04b4..7420cedaa 100644
--- a/packages/dashboard/app/components/ChatView.css
+++ b/packages/dashboard/app/components/ChatView.css
@@ -214,6 +214,11 @@
   font-size: 15px;
 }
 
+.chat-thread-header-new-chat {
+  margin-left: auto;
+  flex-shrink: 0;
+}
+
 /* Messages */
 .chat-messages {
   flex: 1;
@@ -1026,6 +1031,10 @@
     flex-wrap: wrap;
   }
 
+  .chat-thread-header-new-chat {
+    display: none;
+  }
+
   .chat-session-delete-btn {
     opacity: 1;
   }
diff --git a/packages/dashboard/app/components/ChatView.tsx b/packages/dashboard/app/components/ChatView.tsx
index 45ad5c8ed..d3f9df1b3 100644
--- a/packages/dashboard/app/components/ChatView.tsx
+++ b/packages/dashboard/app/components/ChatView.tsx
@@ -1686,6 +1686,16 @@ export function ChatView({ projectId, addToast }: ChatViewProps) {
             <Bot size={16} />
             <span className="chat-thread-header-title">{threadHeaderTitle}</span>
             {showThreadHeaderModelTag && <span className="chat-model-tag">{activeModelTag}</span>}
+            {!isMobile && (
+              <button
+                className="btn btn-sm btn-primary chat-thread-header-new-chat"
+                onClick={() => setShowNewDialog(true)}
+                data-testid="chat-thread-new-chat-btn"
+              >
+                <Plus size={14} />
+                New Chat
+              </button>
+            )}
 
           </div>
         )}
diff --git a/packages/dashboard/app/components/__tests__/ChatView.test.tsx b/packages/dashboard/app/components/__tests__/ChatView.test.tsx
index f942da04e..2f9c0f6a5 100644
--- a/packages/dashboard/app/components/__tests__/ChatView.test.tsx
+++ b/packages/dashboard/app/components/__tests__/ChatView.test.tsx
@@ -2348,6 +2348,49 @@ describe("resizable sidebar", () => {
   });
 });
 
+describe("thread header New Chat button", () => {
+  const activeSession = { id: "session-001", agentId: "agent-001", status: "active", title: "Test Chat", createdAt: "2026-04-08T00:00:00.000Z", updatedAt: "2026-04-08T00:00:00.000Z" };
+
+  it("renders New Chat button in thread header on desktop when session is active", () => {
+    const viewportSpy = mockViewportMode("desktop");
+    setupMockChat({ activeSession });
+
+    render(<ChatView projectId="proj-123" addToast={vi.fn()} />);
+
+    const btn = screen.getByTestId("chat-thread-new-chat-btn");
+    expect(btn).toBeInTheDocument();
+    expect(btn).toHaveTextContent("New Chat");
+    expect(btn).toHaveClass("btn", "btn-sm", "btn-primary");
+
+    viewportSpy.mockRestore();
+  });
+
+  it("clicking thread header New Chat button opens the NewChatDialog", () => {
+    const viewportSpy = mockViewportMode("desktop");
+    setupMockChat({ activeSession });
+
+    render(<ChatView projectId="proj-123" addToast={vi.fn()} />);
+
+    const btn = screen.getByTestId("chat-thread-new-chat-btn");
+    fireEvent.click(btn);
+
+    expect(screen.getByTestId("chat-new-dialog-mode-toggle")).toBeInTheDocument();
+
+    viewportSpy.mockRestore();
+  });
+
+  it("does not render New Chat button in thread header on mobile", () => {
+    const viewportSpy = mockViewportMode("mobile");
+    setupMockChat({ activeSession });
+
+    render(<ChatView projectId="proj-123" addToast={vi.fn()} />);
+
+    expect(screen.queryByTestId("chat-thread-new-chat-btn")).toBeNull();
+
+    viewportSpy.mockRestore();
+  });
+});
+
 describe("ChatView mobile behavior", () => {
   let savedVisualViewport: typeof window.visualViewport;
   let savedInnerHeight: number;