diff --git a/src/commands/configure.ts b/src/commands/configure.ts
index ac4d6abb0..929a2b94f 100644
--- a/src/commands/configure.ts
+++ b/src/commands/configure.ts
@@ -303,11 +303,11 @@ async function promptAuthConfig(
           ...next,
           agent: {
             ...next.agent,
-            model: "google-antigravity/claude-opus-4-5",
+            model: "google-antigravity/claude-opus-4-5-thinking",
           },
         };
         note(
-          "Default model set to google-antigravity/claude-opus-4-5",
+          "Default model set to google-antigravity/claude-opus-4-5-thinking",
           "Model configured",
         );
       }
diff --git a/src/commands/onboard-interactive.ts b/src/commands/onboard-interactive.ts
index bc3975b14..c3bb910ea 100644
--- a/src/commands/onboard-interactive.ts
+++ b/src/commands/onboard-interactive.ts
@@ -276,11 +276,11 @@ export async function runInteractiveOnboarding(
           ...nextConfig,
           agent: {
             ...nextConfig.agent,
-            model: "google-antigravity/claude-opus-4-5",
+            model: "google-antigravity/claude-opus-4-5-thinking",
           },
         };
         note(
-          "Default model set to google-antigravity/claude-opus-4-5",
+          "Default model set to google-antigravity/claude-opus-4-5-thinking",
           "Model configured",
         );
       }