From 8794f94fc44df93179ee1e23868eec6481fe5b06 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 25 May 2026 18:49:38 +0000
Subject: [PATCH 1/2] Initial plan


From 87d502bc25677bfae8bc26e8d1209f9adde44785 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 25 May 2026 18:54:54 +0000
Subject: [PATCH 2/2] fix: use supported OpenAI default for autoblog fallback

---
 .env.example                          |  2 +-
 lib/env.ts                            |  2 +-
 tests/contract/env-backend-ai.test.ts | 21 +++++++++++++++++++++
 3 files changed, 23 insertions(+), 2 deletions(-)
 create mode 100644 tests/contract/env-backend-ai.test.ts

diff --git a/.env.example b/.env.example
index 0c17e4c1..7f398e7d 100644
--- a/.env.example
+++ b/.env.example
@@ -39,7 +39,7 @@ CRON_SECRET=change-me-to-a-long-random-string
 #   openai = prefer OPENAI_API_KEY, fall back to Anthropic if needed
 #   anthropic = prefer ANTHROPIC_API_KEY, fall back to OpenAI if needed
 BACKEND_AI_PROVIDER=openai
-BACKEND_AI_OPENAI_MODEL=gpt-5.5
+BACKEND_AI_OPENAI_MODEL=gpt-5-mini
 ANTHROPIC_API_KEY=
 OPENAI_API_KEY=
 GEMINI_API_KEY=
diff --git a/lib/env.ts b/lib/env.ts
index 3e5ccafa..c1b9dbd2 100644
--- a/lib/env.ts
+++ b/lib/env.ts
@@ -31,7 +31,7 @@ export const env = {
   backendAiProvider:
     process.env.BACKEND_AI_PROVIDER ?? process.env.AI_TEXT_PROVIDER ?? "openai",
   backendAiOpenaiModel:
-    process.env.BACKEND_AI_OPENAI_MODEL ?? "gpt-5.5",
+    process.env.BACKEND_AI_OPENAI_MODEL ?? "gpt-5-mini",
   anthropicApiKey: process.env.ANTHROPIC_API_KEY ?? "",
   openaiApiKey: process.env.OPENAI_API_KEY ?? "",
   geminiApiKey: process.env.GEMINI_API_KEY ?? "",
diff --git a/tests/contract/env-backend-ai.test.ts b/tests/contract/env-backend-ai.test.ts
new file mode 100644
index 00000000..779063f5
--- /dev/null
+++ b/tests/contract/env-backend-ai.test.ts
@@ -0,0 +1,21 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+const originalBackendAiOpenaiModel = process.env.BACKEND_AI_OPENAI_MODEL;
+
+afterEach(() => {
+  vi.resetModules();
+  if (originalBackendAiOpenaiModel === undefined) {
+    delete process.env.BACKEND_AI_OPENAI_MODEL;
+    return;
+  }
+  process.env.BACKEND_AI_OPENAI_MODEL = originalBackendAiOpenaiModel;
+});
+
+describe("backend ai env defaults", () => {
+  it("defaults OpenAI Autoblog model to gpt-5-mini", async () => {
+    delete process.env.BACKEND_AI_OPENAI_MODEL;
+    vi.resetModules();
+    const { env } = await import("@/lib/env");
+    expect(env.backendAiOpenaiModel).toBe("gpt-5-mini");
+  });
+});