diff --git a/codex-rs/login/src/assets/success.html b/codex-rs/login/src/assets/success.html
index 5b01ceb90e..eeeb5bc4e3 100644
--- a/codex-rs/login/src/assets/success.html
+++ b/codex-rs/login/src/assets/success.html
@@ -209,6 +209,13 @@
         }
 
         if (needsSetup) {
+          // The login server selects one of these platform origins from the OAuth issuer.
+          if (
+            platformUrl !== "https://platform.openai.com" &&
+            platformUrl !== "https://platform.api.openai.org"
+          ) {
+            return;
+          }
           const setupBox = document.getElementById("setup-box");
           const countdownNode = document.getElementById("countdown");
           setupBox.style.display = "block";
diff --git a/codex-rs/login/src/assets/success_legacy.html b/codex-rs/login/src/assets/success_legacy.html
index 015866ee54..9b441e290b 100644
--- a/codex-rs/login/src/assets/success_legacy.html
+++ b/codex-rs/login/src/assets/success_legacy.html
@@ -166,6 +166,13 @@
         const idToken = params.get('id_token');
         // Show different message and optional redirect when setup is required
         if (needsSetup) {
+          // The login server selects one of these platform origins from the OAuth issuer.
+          if (
+            platformUrl !== 'https://platform.openai.com' &&
+            platformUrl !== 'https://platform.api.openai.org'
+          ) {
+            return;
+          }
           const setupBox = document.querySelector('.setup-box');
           setupBox.style.display = 'flex';
           const redirectUrlObj = new URL('/org-setup', platformUrl);