OpenAI will remove whisper-1, gpt-4o-transcribe, gpt-4o-mini-transcribe and gpt-4o-transcribe-diarize from its API on February 26, 2027.

Quote found word for word on the live source, last checked October 25, 2026

In the source's own words

“On August 26, 2026, we notified developers using whisper-1 ... of their deprecation and removal from the API on February 26, 2027”

Deprecations, OpenAI API documentation, 2026, Deprecations page, entry dated 2026-08-26: Transcription models.

What it measures: The entry on OpenAI's deprecations page is titled 'Transcription models'. Its table gives a shutdown date of Feb 26, 2027 for each of the four models, with gpt-live-transcribe or gpt-transcribe as the recommended replacement.
What it does not show: The quote covers the notice and the removal date; the four model names come from the same sentence, between the two passages joined by the ellipsis. The same table also removes the /v1/audio/translations endpoint on February 26, 2027. That endpoint is not part of this fact.

A row of History of Dictation Software: A Dated Timeline, as OpenAI transcription removal: 2,027 year.