GPT-Realtime-2
Speech and audio
gpt-realtime-2
$4 text in, $24 text out per 1M tokens
GPT-Realtime-2.1
Low-latency voice agents over WebRTC/WebSocket (/v1/realtime?model=gpt-realtime-2.1).
Model idgpt-realtime-2.1
Price$4 text in, $24 text out per 1M tokens
Checked29 September 2026
Where it stands
48newer 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
- GPT-Realtime-27 May 2026
- After it from OpenAI
- GPT-Live 18 Jul 2026
- Weights
- Closed weights; access is hosted only.
How to call it
2 ways to use GPT-Realtime-2.1, with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| OpenAI API | gpt-realtime-2.1 |
wss://api.openai.com/v1/realtime |
developers.openai.com |
| Azure OpenAI (Microsoft Foundry) | gpt-realtime-2.1 |
learn.microsoft.com |
Pricing
| Text input | $4 per 1M tokens |
|---|---|
| Text output | $24 per 1M tokens |
| Audio input | $32 per 1M tokens |
| Audio output | $64 per 1M tokens |
| Cached input | $0.40 per 1M tokens |
| Image input | $5 per 1M tokens |
As published: “per 1M tokens (USD)”.
Source: developers.openai.com, checked 29 September 2026.
Specs
- Input
- Text, audio and images
- Output
- Text and audio
- Context window
- 128,000 tokens
- Max output
- 32,000 tokens
- Open weights
- No
- Licence
- Proprietary
- Training cutoff
- September 2024
- Released
- 6 July 2026
- Status
- Current
- Type
- Speech and audio
What stands out
What its maker marketed at launch, and what people found later, each with its source.
Reasoning in realtime voice
Configurable reasoning effort in a speech-to-speech model (at a latency cost).
Robust turn-taking
Improved alphanumeric recognition, silence/noise handling and interruption behavior.
Notes
Realtime API only. Successor to gpt-realtime-2 (2026-05-07, same prices, see gpt-realtime-2.md). Mini variant gpt-realtime-2.1-mini (audio $10/$20, text $0.60/$2.40). Replaces gpt-realtime / gpt-4o-realtime (shutdown Jan 20 2027). Azure version 2026-07-07.
Sources: