Best solution for Whisper diarization/speaker labeling?
OpenAI Developer Community
April 8, 2026
Hi Dears
I think there is a model that will be available soon.. GPT-4o Transcribe Diarize
Well, it looks like it is released, but from the SDK we are using (.NET) it became available just now. (couple of days ago)
developers.openai.com
GPT-4o Transcribe Diarize Model | OpenAI API
We are testing this right now as we speak.
Currently when clients select openAI for transcription, we are diarizing via the prompt itself. (We tell the prompt to detect the speakers and diarize). It somewhat works okay. People use it.
This is why we need to get this working GPT-4o Transcribe Diarize so we can remove this workaround from the system prompt.
Discussion in the ATmosphere