China's DeepSeek AI services hit by 5-hour outage on Thursday, affecting V4-Pro and V4.1-Flash models. The Chinese artificial intelligence startup's V4-Pro and V4.1-Flash models and chat services were unusable from 8 a.m. to 1 p.m. The company has given partial refunds to subscribers but has not identified a cause; issues may stem from a shortage of computing power amid US chip export restrictions.