OpenAI's backend account and billing systems experienced a synchronization failure, causing widespread confusion over permissions and quotas for both ChatGPT web subscribers and API developers.
On the web subscription side, some Pro members paying $200 per month saw their usage quotas anomalously reset to 75% or even quadrupled. But others reported their accounts being downgraded to Plus-level restrictions, losing access to the flagship GPT-5.5 Pro reasoning model in chat settings.
For API developers, the account-level sync failure led to erratic rate limits and billing inconsistencies.