diff --git a/studio/frontend/src/components/assistant-ui/__tests__/html-svg-renderer.test.tsx b/studio/frontend/src/components/assistant-ui/__tests__/html-svg-renderer.test.tsx
index 7a89654c11..c74a3d0495 100644
--- a/studio/frontend/src/components/assistant-ui/__tests__/html-svg-renderer.test.tsx
+++ b/studio/frontend/src/components/assistant-ui/__tests__/html-svg-renderer.test.tsx
@@ -203,6 +203,23 @@ describe("parseIncompleteCodeFence", () => {
   it("returns null when the block is not a fence at all", () => {
     expect(parseIncompleteCodeFence("just text")).toBeNull();
   });
+
+  it("recovers a final-but-never-closed fence (small LLMs drop the closing ```)", () => {
+    // Regression: live probe against Qwen3-0.6B caught the model emitting a
+    // complete SVG body but no closing ```. parseCodeFence rejects (strict
+    // ``` ... ``` shape), so the StreamdownBlock fallback must still find the
+    // fence via parseIncompleteCodeFence even after streaming completes -- or
+    // HtmlSvgRenderer never mounts and the user sees a plain code block.
+    const finalNoClose =
+      "```svg\n<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 10 10\">" +
+      "<circle cx=\"5\" cy=\"5\" r=\"4\" fill=\"orange\"/></svg>";
+    expect(parseCodeFence(finalNoClose)).toBeNull();
+    const fence = parseIncompleteCodeFence(finalNoClose);
+    expect(fence).not.toBeNull();
+    expect(fence?.language).toBe("svg");
+    expect(fence?.source).toContain("<circle");
+    expect(fence?.source).toContain("</svg>");
+  });
 });
 
 describe("Fence helpers", () => {
diff --git a/studio/frontend/src/components/assistant-ui/markdown-text.tsx b/studio/frontend/src/components/assistant-ui/markdown-text.tsx
index 7201c9956b..b728f5302c 100644
--- a/studio/frontend/src/components/assistant-ui/markdown-text.tsx
+++ b/studio/frontend/src/components/assistant-ui/markdown-text.tsx
@@ -222,13 +222,14 @@ function renderHighlightedCode(props: BlockProps, codeFence: CodeFenceInfo) {
 function StreamdownBlock(props: BlockProps) {
   const hasMermaidFence = props.content.includes("```mermaid");
   const mermaidSource = getMermaidSource(props.content);
-  // parseCodeFence requires a closing ```; while the fence is still
-  // streaming we fall through to parseIncompleteCodeFence so HtmlSvgRenderer
-  // can mount with isIncomplete=true and lock the Code tab on partial
-  // HTML/SVG fences (the advertised stream-in behaviour).
+  // parseCodeFence requires a closing ```; we fall back to
+  // parseIncompleteCodeFence both while the fence is still streaming AND
+  // when a finished reply forgot to emit the closing ``` (small local LLMs
+  // routinely drop it). Without the second fallback the HtmlSvgRenderer
+  // never mounts on an unclosed final message and the reply degrades to a
+  // plain code block.
   const codeFence =
-    parseCodeFence(props.content) ??
-    (props.isIncomplete ? parseIncompleteCodeFence(props.content) : null);
+    parseCodeFence(props.content) ?? parseIncompleteCodeFence(props.content);
 
   if (props.isIncomplete && hasMermaidFence) {
     return (