diff --git a/src-tauri/src/services/stream_check.rs b/src-tauri/src/services/stream_check.rs
index ffe679e61..76767972d 100644
--- a/src-tauri/src/services/stream_check.rs
+++ b/src-tauri/src/services/stream_check.rs
@@ -55,8 +55,8 @@ impl Default for StreamCheckConfig {
             max_retries: 2,
             degraded_threshold_ms: 6000,
             claude_model: "claude-haiku-4-5-20251001".to_string(),
-            codex_model: "gpt-5.1-codex@low".to_string(),
-            gemini_model: "gemini-3-pro-preview".to_string(),
+            codex_model: "gpt-5.4@low".to_string(),
+            gemini_model: "gemini-3-flash-preview".to_string(),
             test_prompt: default_test_prompt(),
         }
     }
diff --git a/src/components/usage/ModelTestConfigPanel.tsx b/src/components/usage/ModelTestConfigPanel.tsx
index cb6e9feff..65dba22e9 100644
--- a/src/components/usage/ModelTestConfigPanel.tsx
+++ b/src/components/usage/ModelTestConfigPanel.tsx
@@ -25,7 +25,7 @@ export function ModelTestConfigPanel() {
     degradedThresholdMs: "6000",
     claudeModel: "claude-haiku-4-5-20251001",
     codexModel: "gpt-5.4@low",
-    geminiModel: "gemini-3-pro-preview",
+    geminiModel: "gemini-3-flash-preview",
     testPrompt: "Who are you?",
   });