diff --git a/dat-gateway/src/main/java/io/shinhanlife/dat/mcg/presentation/ChatController.java b/dat-gateway/src/main/java/io/shinhanlife/dat/mcg/presentation/ChatController.java
index 8f458066..c87f9eb4 100644
--- a/dat-gateway/src/main/java/io/shinhanlife/dat/mcg/presentation/ChatController.java
+++ b/dat-gateway/src/main/java/io/shinhanlife/dat/mcg/presentation/ChatController.java
@@ -99,7 +99,7 @@ public class ChatController {
             if ("Qwen3-Coder".equalsIgnoreCase(selectedModel) || "Gemma-4-31B".equalsIgnoreCase(selectedModel)) {
                 // 사내 LiteLLM 환경 동적 ChatModel 생성
                 String liteLlmBaseUrl = "https://dev-iam-litellm.shinhanlife.co.kr:18020";
-                String apiKey = "sk-UJ2IRenvaMPbY3ozQdj6zw";
+                String apiKey = "Gemma-4-31B".equalsIgnoreCase(selectedModel) ? "sk-EH107wYBZuU6RUTqthR17A" : "sk-UJ2IRenvaMPbY3ozQdj6zw";
                 
                 org.springframework.ai.openai.api.OpenAiApi openAiApi = org.springframework.ai.openai.api.OpenAiApi.builder()
                         .baseUrl(liteLlmBaseUrl)
diff --git a/dat-gateway/src/main/java/io/shinhanlife/dat/mcg/presentation/ScaffoldingController.java b/dat-gateway/src/main/java/io/shinhanlife/dat/mcg/presentation/ScaffoldingController.java
index a77aac6e..fc915850 100644
--- a/dat-gateway/src/main/java/io/shinhanlife/dat/mcg/presentation/ScaffoldingController.java
+++ b/dat-gateway/src/main/java/io/shinhanlife/dat/mcg/presentation/ScaffoldingController.java
@@ -433,7 +433,7 @@ public class ScaffoldingController {
 
         if ("Qwen3-Coder".equalsIgnoreCase(resolvedModel) || "Gemma-4-31B".equalsIgnoreCase(resolvedModel)) {
             String liteLlmBaseUrl = "https://dev-iam-litellm.shinhanlife.co.kr:18020";
-            String apiKey = "sk-UJ2IRenvaMPbY3ozQdj6zw";
+            String apiKey = "Gemma-4-31B".equalsIgnoreCase(resolvedModel) ? "sk-EH107wYBZuU6RUTqthR17A" : "sk-UJ2IRenvaMPbY3ozQdj6zw";
 
             org.springframework.ai.openai.api.OpenAiApi openAiApi = org.springframework.ai.openai.api.OpenAiApi.builder()
                     .baseUrl(liteLlmBaseUrl)