DeepSeek outage, November 3, 2026

DeepSeek's web chat and the APIs for its V4 Pro and V4.1 Flash models were partially unavailable on November 3, 2026, from 16:58 to 18:48 Beijing time (3:58 AM to 5:48 AM Eastern), a duration of 1 hour 49 minutes as shown on DeepSeek's incident detail page. DeepSeek listed the incident as "DeepSeek Web/API Partially Unavailable" on its status page. A Caixin journalist who tested the service during the outage found the chat function unavailable, with the interface displaying "Server busy, please try again later," according to reporting carried by KuCoin and ChainCatcher. This is the same set of services affected by DeepSeek's October 15, 2026 outage, 19 days earlier.

Timeline: DeepSeek's incident detail records Investigating updates at 3:58 AM and 4:00 AM Eastern (16:58 and 17:00 Beijing) stating the issue was being investigated to identify the cause; Monitoring updates at 4:06, 4:13, 4:36, 5:04, 5:17, 5:21, 5:25, and 5:41 AM Eastern, each stating a fix had been implemented and the results were being monitored; and a Resolved update at 5:48 AM Eastern (18:48 Beijing) stating the incident had been resolved and service had been restored. KuCoin reported the outage at 4:26 AM Eastern, noting that as of 5:06 AM Eastern the team was still investigating and had not yet disclosed the cause.

Affected services and scope: the Chat Service, the DeepSeek V4 Pro API service, and the DeepSeek V4.1 Flash API service, listed in that incident's affected components on DeepSeek's status page. The impact was partial, not a complete outage, on DeepSeek's own wording. DeepSeek is a global service; no region was singled out in the provider's account or in reporting.

Provider's account: DeepSeek said it was investigating to identify the cause, then that a fix had been implemented and it was monitoring the results, and finally that the incident had been resolved and service restored. No cause has been disclosed in the updates read for this record, and no compensation has been stated.

Status: Restored November 3, 2026, at 5:48 AM Eastern (18:48 Beijing). Verified live on November 3, 2026 at 7:24 AM Eastern by the SecurTek outage watch (live browser read by Jim Callahan: status page homepage reading "Everything is running smoothly," incident detail marked Resolved), cross-verified against KuCoin reporting of the same incident, start time, and affected services.

Sources: DeepSeek status page, DeepSeek incident detail, KuCoin: DeepSeek service outage impacts web and API again, KuCoin: DeepSeek dialogue service temporarily unavailable