您好，OPT有60天的grace period, 注意是等到得到通知h1b的最终消息开始计算。
From USCIS: If USCIS denies, rejects, or revokes an H-1B petition filed on behalf of an F-1 student covered by the automatic cap-gap extension of status, the student will have the standard 60-day grace period (from the date of the notification of the denial, rejection, or revocation of the petition) before he or she is required to depart the United States.
