diff --git a/backend/core/config.py b/backend/core/config.py
index aa5c9d0..7511ee2 100755
--- a/backend/core/config.py
+++ b/backend/core/config.py
@@ -28,7 +28,7 @@ class Config:
     OPENAI_MAX_RETRIES: int = int(os.getenv('OPENAI_MAX_RETRIES', '2'))
     
     # Google Configuration
-    GOOGLE_MODEL: str = os.getenv('GOOGLE_MODEL', 'gemini-2.5-pro-preview-03-25')
+    GOOGLE_MODEL: str = os.getenv('GOOGLE_MODEL', 'gemini-3.1-pro-preview')
     GOOGLE_TEMPERATURE: float = float(os.getenv('GOOGLE_TEMPERATURE', '0.1'))
     GOOGLE_MAX_OUTPUT_TOKENS: int = int(os.getenv('GOOGLE_MAX_OUTPUT_TOKENS', '8192'))
     GOOGLE_THINKING_BUDGET: int = int(os.getenv('GOOGLE_THINKING_BUDGET', '12000'))
diff --git a/docker-compose.yml b/docker-compose.yml
index 1c25756..6aa3405 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -62,7 +62,7 @@ services:
 
       # Google Gemini
       GEMINI_API_KEY: ${GEMINI_API_KEY:-}
-      GOOGLE_MODEL: ${GOOGLE_MODEL:-gemini-2.5-pro-preview-03-25}
+      GOOGLE_MODEL: ${GOOGLE_MODEL:-gemini-3.1-pro-preview}
       GOOGLE_TEMPERATURE: ${GOOGLE_TEMPERATURE:-0.7}
       GOOGLE_MAX_OUTPUT_TOKENS: ${GOOGLE_MAX_OUTPUT_TOKENS:-100000}
       GOOGLE_THINKING_BUDGET: ${GOOGLE_THINKING_BUDGET:-12000}