diff --git a/genaisrc/myopt.genai.mts b/genaisrc/myopt.genai.mts
index a3aa62dac..c14f13d55 100644
--- a/genaisrc/myopt.genai.mts
+++ b/genaisrc/myopt.genai.mts
@@ -30,5 +30,5 @@ const file = await workspace.readText(inputFile);
 const answer = await invokeLLMUpdate(file.content);
 // Extract the code from the answer by removing ```cpp and ```:
 let code = answer.replace(/```cpp/g, "").replace(/```/g, "");
-const outputFile = inputFile.filename + ".patch";
+const outputFile = inputFile.filename + ".opt";
 await workspace.writeText(outputFile, code);