As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/m/gpt-realtime/

# GPT-Realtime and GPT-Realtime mini

OpenAI, GPT Realtime family. Status: deprecated. Type: speech and audio. Released: 2025-08-28. Training cutoff: 2023-10.

## How to call it

| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| OpenAI API | `gpt-realtime` | wss://api.openai.com/v1/realtime | https://developers.openai.com/api/docs/models/gpt-realtime |
| OpenAI API | `gpt-realtime-mini` | wss://api.openai.com/v1/realtime | https://developers.openai.com/api/docs/models/gpt-realtime-mini |

## Pricing

- Text input: $4 per 1M tokens
- Text output: $16 per 1M tokens
- Audio input: $32 per 1M tokens
- Audio output: $64 per 1M tokens
- Cached input: $0.40 per 1M tokens
- Unit as published: per 1M tokens (USD) for gpt-realtime; gpt-realtime-mini audio $10 in / $20 out, text $0.60 / $2.40
- Source: https://developers.openai.com/api/docs/pricing
- Last checked: 2026-09-29

## Specs

- Input: text, audio, image
- Output: text, audio
- Context window: 32,000 tokens
- Max output: 4,096 tokens
- Open weights: no
- Licence: proprietary

## Where it stands

- Newer speech and audio models in the registry since its release: 88. The 5 newest:
  - NVIDIA Nemotron 3.5 Transcribe (30B-A4B) (2026-10-28) https://postcutoff.com/m/nemotron-3-5-transcribe/
  - Hy-SimulMT-30B-A3B (2026-10-22) https://postcutoff.com/m/hy-simulmt-30b-a3b/
  - Eleven Realtime v1 Max / Mini (2026-10-20) https://postcutoff.com/m/eleven-realtime-v1-max/
  - Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3) (2026-10-20) https://postcutoff.com/m/voxtral-mini-transcribe-3/
  - Voxtral Small Transcribe 3 (2026-10-20) https://postcutoff.com/m/voxtral-small-transcribe-3/
- Before it from OpenAI: GPT-4o mini TTS (2025-03-20) https://postcutoff.com/m/gpt-4o-mini-tts/
- After it from OpenAI: GPT-Realtime-1.5 (2026-02-23) https://postcutoff.com/m/gpt-realtime-1-5/
- Closed weights; access is hosted only.

## What stands out

- First GA OpenAI realtime speech-to-speech model: Shipped with Realtime API general availability (2025-08-28); speaks over WebRTC, WebSocket or SIP phone calls. Source: https://developers.openai.com/api/docs/models/gpt-realtime

## Notes

Deprecated 2026-07-20, shutdown 2027-01-20; replacements gpt-realtime-2.1 and gpt-realtime-2.1-mini. gpt-realtime-mini released 2025-10-06; its alias moved to the 2025-12-15 snapshot on 2026-01-13. Earlier gpt-4o-realtime-preview models were shut down 2026-05-12.

Sources:
- https://developers.openai.com/api/docs/models/gpt-realtime
- https://developers.openai.com/api/docs/pricing
- https://developers.openai.com/api/docs/changelog
- https://developers.openai.com/api/docs/deprecations

Model page: https://postcutoff.com/m/gpt-realtime/