The Hangzhou-based AI lab’s namesake chatbot website and app were offline from Sunday evening, with the company continuing to investigate while issuing fixes from between 1am and 9am on Monday, according to service maintenance records the company published online.
The service appeared to be restored by 9.13am, according to a trial use by the South China Morning Post. At the time, DeepSeek said in its records that “a fix” had been implemented and added it was continuing to monitor the results.
Chinese social media platforms were flooded with posts from users across the country complaining about the breakdown.