diff --git a/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Dtos/Anthropic/AnthropicMessageInput.cs b/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Dtos/Anthropic/AnthropicMessageInput.cs
index 8242f251..6ea5a867 100644
--- a/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Dtos/Anthropic/AnthropicMessageInput.cs
+++ b/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Dtos/Anthropic/AnthropicMessageInput.cs
@@ -22,11 +22,15 @@ public class AnthropicMessageInput
                 throw new ValidationException("Messages 中 Content 和 Contents 字段不能同时有值");
             }
 
-            if (Content is not null)
+            if (!string.IsNullOrEmpty(Content))
             {
                 return Content;
             }
-
+            // 如果 Contents 为空或 null，返回空字符串而不是 null
+            if (Contents == null || Contents.Count == 0)
+            {
+                return "_"; // 兼容客户端空值问题
+            }
             return Contents!;
         }
         set