diff --git a/.github/workflows/openclaw-cross-os-release-checks-reusable.yml b/.github/workflows/openclaw-cross-os-release-checks-reusable.yml
index a9d9a47c591..148eba6d9a4 100644
--- a/.github/workflows/openclaw-cross-os-release-checks-reusable.yml
+++ b/.github/workflows/openclaw-cross-os-release-checks-reusable.yml
@@ -166,7 +166,7 @@ env:
   PNPM_VERSION: "10.32.1"
   OPENCLAW_REPOSITORY: openclaw/openclaw
   TSX_VERSION: "4.21.0"
-  OPENCLAW_CROSS_OS_OPENAI_MODEL: ${{ vars.OPENCLAW_CROSS_OS_OPENAI_MODEL || 'openai/gpt-5.4-mini' }}
+  OPENCLAW_CROSS_OS_OPENAI_MODEL: ${{ vars.OPENCLAW_CROSS_OS_OPENAI_MODEL || 'openai/gpt-5.5' }}
 
 jobs:
   prepare:
diff --git a/test/scripts/openclaw-cross-os-release-checks.test.ts b/test/scripts/openclaw-cross-os-release-checks.test.ts
index ea103bf7039..3aa6ebbacea 100644
--- a/test/scripts/openclaw-cross-os-release-checks.test.ts
+++ b/test/scripts/openclaw-cross-os-release-checks.test.ts
@@ -137,6 +137,18 @@ describe("scripts/openclaw-cross-os-release-checks", () => {
     expect(resolveProviderConfig("openai", {})?.model).toBe("openai/gpt-5.5");
   });
 
+  it("keeps cross-OS release workflow OpenAI default on GPT-5.5", () => {
+    const workflow = readFileSync(
+      ".github/workflows/openclaw-cross-os-release-checks-reusable.yml",
+      "utf8",
+    );
+
+    expect(workflow).toContain(
+      "OPENCLAW_CROSS_OS_OPENAI_MODEL: ${{ vars.OPENCLAW_CROSS_OS_OPENAI_MODEL || 'openai/gpt-5.5' }}",
+    );
+    expect(workflow).not.toContain("openai/gpt-5.4-mini");
+  });
+
   it("keeps release smoke plugin allowlists focused on agent-turn essentials", () => {
     const allowlist = buildCrossOsReleaseSmokePluginAllowlist({ extensionId: "openai" });