diff --git a/src/opencodeService.ts b/src/opencodeService.ts
index 27ec010..bb4a5b2 100644
--- a/src/opencodeService.ts
+++ b/src/opencodeService.ts
@@ -60,8 +60,11 @@ Generate a concise Conventional Commit message for these changes:`;
     return new Promise((resolve, reject) => {
         const args: string[] = [
             "run",
+            "--pure",
             "--format",
             "default",
+            "-m",
+            "opencode/gpt-5-nano",
             "--variant",
             "minimal",
         ];