diff --git a/offline-backend-20260512/backend/config.yaml b/offline-backend-20260512/backend/config.yaml
index 5bda2872..5ea07717 100644
--- a/offline-backend-20260512/backend/config.yaml
+++ b/offline-backend-20260512/backend/config.yaml
@@ -23,6 +23,18 @@ models:
     supports_vision: true
     supports_thinking: true
 
+  - name: deepseek-chat
+    display_name: DeepSeek Chat
+    use: langchain_openai:ChatOpenAI
+    model: deepseek-chat
+    api_key: sk-1520028668cb4cc388ed8315ff1e856e
+    base_url: https://api.deepseek.com
+    request_timeout: 600.0
+    max_retries: 2
+    max_tokens: 4096
+    temperature: 1.0
+    supports_vision: true
+    supports_thinking: true
   - name: deepseek-v4-flash
     display_name: DeepSeek V4 Flash
     use: langchain_openai:ChatOpenAI