# Realtime-2 for Builders: Speech-to-Speech Agents With Flagship-Class Reasoning

Times of AI Desk · 2026-05-07 · Models

[https://timesof.ai/2026/05/openai-realtime-voice-models-api](https://timesof.ai/2026/05/openai-realtime-voice-models-api)

> OpenAI’s Realtime API adds GPT-Realtime-2 (GPT-5-class reasoning for live voice agents), Realtime-Translate (70+→13 languages), and Realtime-Whisper (streaming STT) — API-first infrastructure for phone agents and multilanguage apps, distinct from ChatGPT consumer Voice. Pricing: Realtime-2 $32/$64 per M audio tokens.

May 5 made GPT-5.5 Instant the ChatGPT default. May 7 is the parallel story for **builders**: speech-to-speech agents with flagship-class reasoning — infrastructure for phone agents and multilanguage apps, not a consumer Voice rebrand.

**OpenAI** (May 7) released three **Realtime API** voice models: **GPT-Realtime-2** (most intelligent speech-to-speech path yet, GPT-5-class reasoning for harder multi-turn voice agents), **GPT-Realtime-Translate** (live speech translation: **70+** input → **13** output languages), and **GPT-Realtime-Whisper** (streaming speech-to-text while the user is speaking). Playground available.

## What shipped

| Model | Role | Pricing notes (OpenAI) |
|-------|------|------------------------|
| **GPT-Realtime-2** | Live conversational voice agents | $32 / $64 per M audio in/out; $0.40 cached input |
| **GPT-Realtime-Translate** | Live translation | $0.034 / min |
| **GPT-Realtime-Whisper** | Streaming STT | $0.017 / min |

Surface: Realtime API (WebRTC/WebSocket/SIP-style stacks) — **API-first**.

## Claims vs checks

Model roles and prices are **OpenAI primary**. “GPT-5-class reasoning” and “most intelligent yet” are **vendor positioning** — check independent voice-agent benches when published; do not invent Elo. TechCrunch same-day coverage confirms the trio.

## Limits

- Latency and interruption quality are workload-dependent; no independent MOS suite in the launch post.
- Translate language lists are OpenAI-stated.
- Distinct from ChatGPT Voice feature set and pricing.

## Sources

- [OpenAI: “Advancing voice intelligence with new models in the API”](https://openai.com/index/advancing-voice-intelligence-with-new-models-in-the-api) (May 7, 2026).
- TechCrunch same-day coverage; OpenAI community announcement thread (May 7, 2026).