Grok Build 还不支持 V4-flash 的 responses 协议是吧？ 有佬配置成功过吗 
现在总是报错 

块引用 
Retry failed: serialization error: unknown variant ping, expected one of response.created, response.in_progress, 
response.completed, response.failed, response.incomplete, response.output_item.added, response.output_item.done, 
response.content_part.added, response.content_part.done, response.output_text.delta, response.output_text...