diff --git a/agents-flex-core/src/main/java/com/agentsflex/core/llm/client/impl/Util.java b/agents-flex-core/src/main/java/com/agentsflex/core/llm/client/impl/Util.java
new file mode 100644
index 0000000..2b3af2d
--- /dev/null
+++ b/agents-flex-core/src/main/java/com/agentsflex/core/llm/client/impl/Util.java
@@ -0,0 +1,54 @@
+/*
+ *  Copyright (c) 2023-2025, Agents-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.agentsflex.core.llm.client.impl;
+
+import com.agentsflex.core.llm.exception.LlmException;
+import com.agentsflex.core.util.StringUtil;
+import okhttp3.Response;
+import okhttp3.ResponseBody;
+
+import java.io.IOException;
+
+class Util {
+
+    public static Throwable getFailureThrowable(Throwable t, Response response) {
+        if (t != null) {
+            return t;
+        }
+
+        if (response != null) {
+            String errMessage = "Response code: " + response.code();
+            String message = response.message();
+            if (StringUtil.hasText(message)) {
+                errMessage += ", message: " + message;
+            }
+            try (ResponseBody body = response.body()) {
+                if (body != null) {
+                    String string = body.string();
+                    if (StringUtil.hasText(string)) {
+                        errMessage += ", body: " + string;
+                    }
+                }
+            } catch (IOException e) {
+                // ignore
+            }
+            t = new LlmException(errMessage);
+        }
+
+        return t;
+
+    }
+}