GPT Realtime is Now Available in Vapi

OpenAI’s new GPT Realtime model is now live in Vapi’s dashboard and API.

We’ve been testing it ahead of launch and it’s a noticeable step forward for real-time, production-grade use cases. Conversations feel more natural, with sharper turn-taking and clearer audio quality.

What’s New in GPT Realtime

Compared to earlier real-time models, GPT Realtime delivers:

Lower latency: The response time feels natural. It’s fast enough for real-time, production-grade use cases where back-and-forth conversation is critical.
Sharper instruction following: Handles 3–5 turn transactional flows with reliability.
Multilingual flexibility: Switches languages mid-sentence with high accuracy.
Improved tool‑calling design: Prompt-based creation is more intuitive and powerful.
Voice upgrades: Cedar delivers a warm, conversational tone and strong accent emulation; Marin adds clarity for structured communication.
Structured data handling: Names, phone numbers, and emails are repeated back with natural pacing, without sounding robotic.
Audio quality boost:: Clearer, crisper sound with fewer distortions compared to earlier versions.

Why This Matters

These improvements open up applications where timing, tone, and nuance matter.

Here are a few use cases already being explored with early adopters:

Healthcare triage: Collecting and repeating structured data like names and insurance IDs, with tone and pacing that patients trust.
Coaching and training: Real-time back-and-forth with natural pauses and encouragement instead of robotic interruptions.
Customer support: Transactional flows such as rescheduling appointments or troubleshooting accounts, handled in 3 to 5 turns reliably.
Global services: A user can start in English, switch to Spanish, and continue the conversation naturally.