diff --git a/backend/internal/service/antigravity_model_mapping_test.go b/backend/internal/service/antigravity_model_mapping_test.go
index 1e37cdc2..39000e4f 100644
--- a/backend/internal/service/antigravity_model_mapping_test.go
+++ b/backend/internal/service/antigravity_model_mapping_test.go
@@ -104,28 +104,28 @@ func TestAntigravityGatewayService_GetMappedModel(t *testing.T) {
 			expected:       "claude-opus-4-5-thinking",
 		},
 		{
-			name:           "系统映射 - claude-haiku-4 → gemini-3-flash",
+			name:           "系统映射 - claude-haiku-4 → claude-sonnet-4-5",
 			requestedModel: "claude-haiku-4",
 			accountMapping: nil,
-			expected:       "gemini-3-flash",
+			expected:       "claude-sonnet-4-5",
 		},
 		{
-			name:           "系统映射 - claude-haiku-4-5 → gemini-3-flash",
+			name:           "系统映射 - claude-haiku-4-5 → claude-sonnet-4-5",
 			requestedModel: "claude-haiku-4-5",
 			accountMapping: nil,
-			expected:       "gemini-3-flash",
+			expected:       "claude-sonnet-4-5",
 		},
 		{
-			name:           "系统映射 - claude-3-haiku-20240307 → gemini-3-flash",
+			name:           "系统映射 - claude-3-haiku-20240307 → claude-sonnet-4-5",
 			requestedModel: "claude-3-haiku-20240307",
 			accountMapping: nil,
-			expected:       "gemini-3-flash",
+			expected:       "claude-sonnet-4-5",
 		},
 		{
-			name:           "系统映射 - claude-haiku-4-5-20251001 → gemini-3-flash",
+			name:           "系统映射 - claude-haiku-4-5-20251001 → claude-sonnet-4-5",
 			requestedModel: "claude-haiku-4-5-20251001",
 			accountMapping: nil,
-			expected:       "gemini-3-flash",
+			expected:       "claude-sonnet-4-5",
 		},
 		{
 			name:           "系统映射 - claude-sonnet-4-5-20250929",