deepseek default model

long-article-server/src/main/java/com/tzld/piaoquan/longarticle/utils/other/DeepSeekAPI.java

@@ -34,7 +34,7 @@ public class DeepSeekAPI {
 
     public static String chat(String txt, Map<String, String> responseFormat) {
         Map<String, Object> paramMap = new HashMap<>();
-        paramMap.put("model", "deepseek-chat");
+        paramMap.put("model", "deepseek-v4-flash");
         if (!CollectionUtils.isEmpty(responseFormat)) {
             paramMap.put("response_format", responseFormat);
         }