diff --git a/src/codex/account-store.ts b/src/codex/account-store.ts
index 1e8885ae11..4bf1d02703 100644
--- a/src/codex/account-store.ts
+++ b/src/codex/account-store.ts
@@ -1137,9 +1137,20 @@ async function resolveCodexToken(
       let errDesc: string;
       let errCodeExact: string | undefined;
       try {
-        const parsed = JSON.parse(errText) as { error?: string; error_description?: string };
-        errCodeExact = typeof parsed.error === "string" ? parsed.error.trim() : undefined;
-        errDesc = [parsed.error, parsed.error_description].filter(Boolean).join(": ") || `HTTP ${res.status}`;
+        const parsed = JSON.parse(errText) as {
+          error?: string | { code?: string; message?: string };
+          error_description?: string;
+        };
+        if (typeof parsed.error === "string") {
+          errCodeExact = parsed.error.trim();
+          errDesc = [parsed.error, parsed.error_description].filter(Boolean).join(": ");
+        } else if (parsed.error && typeof parsed.error === "object") {
+          errCodeExact = typeof parsed.error.code === "string" ? parsed.error.code.trim() : undefined;
+          errDesc = [parsed.error.code, parsed.error.message, parsed.error_description].filter(Boolean).join(": ");
+        } else {
+          errDesc = parsed.error_description || `HTTP ${res.status}`;
+        }
+        if (!errDesc) errDesc = `HTTP ${res.status}`;
       } catch { errDesc = `HTTP ${res.status}`; }
       // `invalid_grant` is the standard OAuth code for a refresh token that is no longer
       // usable, and upstream sends it bare with no description. Without it here the dead
@@ -1150,8 +1161,10 @@ async function resolveCodexToken(
       // `server_error` whose description happens to mention invalid_grant would otherwise
       // retire a healthy account, which is the failure this whole change exists to remove.
       const reason = errCodeExact === "invalid_grant"
+          || errCodeExact === "refresh_token_invalidated"
           || errDesc.includes("invalidated") || errDesc.includes("revoked") ? "revoked" as const
-        : errDesc.includes("expired") ? "expired" as const
+        : errCodeExact === "refresh_token_expired"
+          || errDesc.includes("expired") ? "expired" as const
         : "unknown" as const;
       throw new TokenRefreshError(reason, `Codex token refresh failed (${reason}); reauthenticate the account.`);
     }
diff --git a/tests/codex-integration/codex-account-store.test.ts b/tests/codex-integration/codex-account-store.test.ts
index e44ce355e0..6539349337 100644
--- a/tests/codex-integration/codex-account-store.test.ts
+++ b/tests/codex-integration/codex-account-store.test.ts
@@ -1155,6 +1155,82 @@ describe("codex-account-store CRUD", () => {
     }
   });
 
+  test("nested error object with refresh_token_invalidated classifies as revoked", async () => {
+    const { forceRefreshCodexPoolToken, readCodexAccountRecord, saveCodexAccountCredential, TokenRefreshError } =
+      await import("../../src/codex/account-store");
+    saveCodexAccountCredential("invalidated-grant", {
+      accessToken: "rejected",
+      refreshToken: "grant",
+      expiresAt: Date.now() + 3600_000,
+      chatgptAccountId: "acc",
+    });
+    const generation = readCodexAccountRecord("invalidated-grant")!.generation;
+    const originalFetch = globalThis.fetch;
+    globalThis.fetch = (async () =>
+      Response.json(
+        {
+          error: {
+            message: "Your session has ended. Please log in again.",
+            type: "invalid_request_error",
+            param: null,
+            code: "refresh_token_invalidated",
+          },
+        },
+        { status: 401 },
+      )) as typeof fetch;
+
+    try {
+      await forceRefreshCodexPoolToken("invalidated-grant", {
+        rejectedGeneration: generation,
+        rejectedAccessToken: "rejected",
+      });
+      throw new Error("expected a TokenRefreshError");
+    } catch (error) {
+      expect(error).toBeInstanceOf(TokenRefreshError);
+      expect((error as InstanceType<typeof TokenRefreshError>).reason).toBe("revoked");
+    } finally {
+      globalThis.fetch = originalFetch;
+    }
+  });
+
+  test("nested error object with refresh_token_expired classifies as expired", async () => {
+    const { forceRefreshCodexPoolToken, readCodexAccountRecord, saveCodexAccountCredential, TokenRefreshError } =
+      await import("../../src/codex/account-store");
+    saveCodexAccountCredential("expired-grant", {
+      accessToken: "rejected",
+      refreshToken: "grant",
+      expiresAt: Date.now() + 3600_000,
+      chatgptAccountId: "acc",
+    });
+    const generation = readCodexAccountRecord("expired-grant")!.generation;
+    const originalFetch = globalThis.fetch;
+    globalThis.fetch = (async () =>
+      Response.json(
+        {
+          error: {
+            message: "The refresh token has expired.",
+            type: "invalid_request_error",
+            param: null,
+            code: "refresh_token_expired",
+          },
+        },
+        { status: 401 },
+      )) as typeof fetch;
+
+    try {
+      await forceRefreshCodexPoolToken("expired-grant", {
+        rejectedGeneration: generation,
+        rejectedAccessToken: "rejected",
+      });
+      throw new Error("expected a TokenRefreshError");
+    } catch (error) {
+      expect(error).toBeInstanceOf(TokenRefreshError);
+      expect((error as InstanceType<typeof TokenRefreshError>).reason).toBe("expired");
+    } finally {
+      globalThis.fetch = originalFetch;
+    }
+  });
+
   test("a replacement landing mid-refresh is not reported as this call's own lineage (#2887 review)", async () => {
     // `selfRefreshed` is what gates the affinity handoff. An external replacement must not
     // set it: that credential may be a different upstream identity, so inheriting the