On November 8, multiple technology communities reported a large-scale account ban incident at OpenAI. A large number of users on Reddit and domestic developer communities reported that their ChatGPT accounts had been suspended without warning, including Pro users paying a monthly subscription fee of $200. Users said that most banned accounts did not receive prior email notifications and were simply prompted upon login that the account had been deleted or suspended. The bans were triggered by batch identification in the system backend rather than manual review one by one. The affected accounts were mainly concentrated among low-price-region subscription accounts, bulk-registered accounts, accounts sharing payment cards or devices, relay reverse-proxy access, API quota resale, and accounts suspected of model distillation. Some users also said they had used the service compliantly in daily use but were implicated because the system determined they were associated with already banned accounts. OpenAI has had precedents for batch account bans before. In 2023, it concentratedly banned a batch of accounts, and since then it has repeatedly cleaned up enterprise and developer accounts involved in large-scale distillation and API abuse. As of press time, OpenAI had not published a unified explanation or disclosed the specific number of affected people.