diff --git a/package.json b/package.json
index a010cff1..56d3baed 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
     "test:integration": "vitest run --include 'tests/integration/**/*.test.ts'",
     "test:stress": "vitest run --config tests/vitest.config.ts",
     "test:real": "vitest run --config tests/real/vitest.config.ts",
+    "test:local-chat": "vitest run tests/local-chat/chat-completions.test.ts",
     "dev": "tsx watch src/index.ts",
     "dev:web": "cd web && npx vite",
     "build:web": "cd web && npx vite build",
diff --git a/tests/local-chat/chat-completions.test.ts b/tests/local-chat/chat-completions.test.ts
new file mode 100644
index 00000000..be29b9be
--- /dev/null
+++ b/tests/local-chat/chat-completions.test.ts
@@ -0,0 +1,105 @@
+import { describe, it, expect } from "vitest";
+import { execFile } from "node:child_process";
+import { promisify } from "node:util";
+
+const execFileAsync = promisify(execFile);
+const baseUrl = "http://localhost:8080/v1/chat/completions";
+const apiKey = "sk-ssujojoqwer1234aaaa";
+
+async function runCurl(payload: Record<string, unknown>) {
+  const { stdout } = await execFileAsync(
+    "curl",
+    [
+      "-sS",
+      "-w",
+      "\n%{http_code}",
+      baseUrl,
+      "-H",
+      "Content-Type: application/json",
+      "-H",
+      `Authorization: Bearer ${apiKey}`,
+      "-d",
+      JSON.stringify(payload),
+    ],
+    { timeout: 30000 }
+  );
+
+  const lines = stdout.split("\n");
+  const statusLine = lines.pop() ?? "";
+  const body = lines.join("\n");
+  const status = Number(statusLine.trim());
+
+  return { status, body };
+}
+
+describe("local chat completions (curl)", () => {
+  it("gpt-5.4 returns OK", async () => {
+    const { status, body } = await runCurl({
+      model: "gpt-5.4",
+      messages: [{ role: "user", content: "Directly reply OK." }],
+    });
+
+    expect(status).toBe(200);
+    expect(body).toContain("OK");
+  });
+
+  it("gpt-5.4-mini returns OK", async () => {
+    const { status, body } = await runCurl({
+      model: "gpt-5.4-mini",
+      messages: [{ role: "user", content: "Directly reply OK." }],
+    });
+
+    expect(status).toBe(200);
+    expect(body).toContain("OK");
+  });
+
+  it("gpt-5.4-mini-fast returns OK", async () => {
+    const { status, body } = await runCurl({
+      model: "gpt-5.4-mini-fast",
+      messages: [{ role: "user", content: "Directly reply OK." }],
+    });
+
+    expect(status).toBe(200);
+    expect(body).toContain("OK");
+  });
+
+  it("gpt-5.4-xhigh-fast returns OK", async () => {
+    const { status, body } = await runCurl({
+      model: "gpt-5.4-xhigh-fast",
+      messages: [{ role: "user", content: "Directly reply OK." }],
+    });
+
+    expect(status).toBe(200);
+    expect(body).toContain("OK");
+  });
+
+  it("gpt-5.4-xhigh returns OK", async () => {
+    const { status, body } = await runCurl({
+      model: "gpt-5.4-xhigh",
+      messages: [{ role: "user", content: "Directly reply OK." }],
+    });
+
+    expect(status).toBe(200);
+    expect(body).toContain("OK");
+  });
+
+  it("openrouter/free returns OK", async () => {
+    const { status, body } = await runCurl({
+      model: "openrouter/free",
+      messages: [{ role: "user", content: "Directly reply OK." }],
+    });
+
+    expect(status).toBe(200);
+    expect(body).toContain("OK");
+  });
+
+  it("minimaxai/minimax-m2.7 returns OK", async () => {
+    const { status, body } = await runCurl({
+      model: "minimaxai/minimax-m2.7",
+      messages: [{ role: "user", content: "Directly reply OK." }],
+    });
+
+    expect(status).toBe(200);
+    expect(body).toContain("OK");
+  });
+});
diff --git a/vitest.config.ts b/vitest.config.ts
index 505e8be3..e1f585ad 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -16,6 +16,7 @@ export default defineConfig({
       "tests/unit/**/*.{test,spec}.ts",
       "tests/integration/**/*.{test,spec}.ts",
       "tests/e2e/**/*.{test,spec}.ts",
+      "tests/local-chat/**/*.{test,spec}.ts",
       "packages/electron/__tests__/**/*.{test,spec}.ts",
     ],
   },