Shutdown-related lifecycle events
Browse announced and confirmed shutdown events with dates, affected entities, current status, and supporting public evidence.
OpenAI formally deprecated the Assistants API after Responses API feature parity and set August 26, 2026 as the shutdown date, with migration guidance to the Responses API.
OpenAI Assistants APIOpenAI updated the classifier announcement to state that the AI Text Classifier was no longer available due to its low rate of accuracy.
OpenAI AI Text Classifier