# MAI-Realtime rumor — Microsoft's full-duplex voice model hidden in MAI Playground

> TestingCatalog spotted an unannounced Microsoft voice model — MAI-Realtime — running as a hidden preview alongside the public MAI models.

- Org: Microsoft
- Date: 2026-08-02
- Category: rumor, model
- Source: https://www.testingcatalog.com/exclusive-microsoft-tests-new-mai-realtime-voice-model/
- Canonical page: https://ai-tldr.dev/releases/microsoft-mai-realtime-rumor-aug2/

## In short

MAI-Realtime is a bidirectional voice model Microsoft is quietly testing in its MAI Playground — the first native full-duplex speech model from the in-house MAI family, listening and speaking at the same time.

## What it is

MAI-Realtime is an unannounced bidirectional voice model from Microsoft's in-house MAI team, discovered by TestingCatalog as a hidden entry in the MAI Playground on August 2, 2026. Unlike Microsoft's existing MAI-Voice-1 (text-to-speech) and MAI-Transcribe-1.5 (speech-to-text), MAI-Realtime is a single native speech-to-speech model that listens and speaks at the same time.

## How it works

The MAI-Realtime preview panel exposes 17 languages — English, German, Spanish, French, Italian, Portuguese, Japanese, Korean, Chinese, Dutch, Hindi, Indonesian, Arabic, Russian, Turkish, Vietnamese, Thai — and two voices, Victoria and Grant. Turn-taking is configurable: a Switchboard mode uses the MAI-Ears endpointer while a deterministic mode relies on silence detection plus a Whisper semantic endpointer. TestingCatalog reports the model can call web search and other tools mid-conversation.

## Why it matters

A native full-duplex model would give Microsoft its own answer to OpenAI's realtime voice API and Sesame — the last piece Copilot needs to run voice agents end-to-end without leaning on OpenAI infrastructure. Microsoft has not published a model card, pricing, launch date, or added MAI-Realtime to the public MAI catalogue; TestingCatalog frames it as a tightly controlled partner preview, not an imminent public launch.

## Who it's for

Microsoft-ecosystem developers watching Copilot's move away from OpenAI voice

## Links

- [TestingCatalog Scoop](https://www.testingcatalog.com/exclusive-microsoft-tests-new-mai-realtime-voice-model/)
- [Crypto Briefing Coverage](https://cryptobriefing.com/microsoft-mai-realtime-bidirectional-voice-model/)
- [MAI Family Background](https://microsoft.ai/news/two-new-in-house-models/)