GPT-4o mini TTS
Speech and audio
gpt-4o-mini-tts
$0.60 text in, $12 audio out per 1M tokens
GPT-4o Transcribe / Mini Transcribe / Transcribe Diarize
Migrate to gpt-transcribe or gpt-live-transcribe.
Model idgpt-4o-transcribe
Price$2.50 in, $10 out per 1M tokens
Checked29 September 2026
Where it stands
98newer speech and audio models since its release
- NVIDIA Nemotron 3.5 Transcribe (30B-A4B)28 Oct 2026
- Hy-SimulMT-30B-A3B22 Oct 2026
- Eleven Realtime v1 Max / Mini20 Oct 2026
- Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3)20 Oct 2026
- Voxtral Small Transcribe 320 Oct 2026
The 5 newest are listed. All speech and audio models
- Before it from OpenAI
- TTS-1 / TTS-1 HD6 Nov 2023
- After it from OpenAI
- GPT-Realtime and GPT-Realtime mini28 Aug 2025
- Weights
- Closed weights; access is hosted only.
How to call it
3 ways to use GPT-4o Transcribe / Mini Transcribe / Transcribe Diarize, with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| OpenAI API | gpt-4o-transcribe |
https://api.openai.com/v1/audio/transcriptions |
developers.openai.com |
| OpenAI API | gpt-4o-mini-transcribe |
https://api.openai.com/v1/audio/transcriptions |
developers.openai.com |
| OpenAI API | gpt-4o-transcribe-diarize |
https://api.openai.com/v1/audio/transcriptions |
Pricing
| Input | $2.50 per 1M tokens |
|---|---|
| Output | $10 per 1M tokens |
As published: “per 1M tokens (USD) for gpt-4o-transcribe and gpt-4o-transcribe-diarize (~$0.006/min); gpt-4o-mini-transcribe $1.25 / $5 (~$0.003/min)”.
Source: developers.openai.com, checked 29 September 2026.
Specs
- Input
- Audio and text
- Output
- Text
- Context window
- 16,000 tokens
- Max output
- 2,000 tokens
- Open weights
- No
- Licence
- Proprietary
- Training cutoff
- June 2024
- Released
- 20 March 2025
- Status
- Deprecated
- Type
- Speech and audio
What stands out
What its maker marketed at launch, and what people found later, each with its source.
LLM-based transcription
Uses GPT-4o for speech-to-text with better accuracy than the original Whisper models; also usable in Realtime transcription sessions.
Notes
Deprecated 2026-08-26, shutdown 2027-02-26 (with whisper-1); replacements gpt-transcribe (files) and gpt-live-transcribe (streaming). gpt-4o-mini-transcribe-2025-03-20 was separately deprecated 2026-07-20 in favour of the 2025-12-15 snapshot.
Sources:
- https://developers.openai.com/api/docs/models/gpt-4o-transcribe
- https://developers.openai.com/api/docs/pricing
- https://developers.openai.com/api/docs/deprecations
Not yet checked against an official source: Release date 2025-03-20 is the date of the gpt-4o-mini-tts/transcribe snapshots, not re-verified on an OpenAI launch post.