{"data":{"id":2126,"lang":"en","title":"Microsoft Tests MAI-Realtime, a Full-Duplex Voice Model to Rival OpenAI in Copilot","summary":"Microsoft is quietly testing MAI-Realtime, an in-house bidirectional voice AI model meant to replace its reliance on OpenAI's voice tech in Copilot.","category":"ai","category_label":"AI","published_at":"2026-08-03T22:01:24Z","updated_at":"2026-08-03T22:01:24Z","url":"https://techtools.cz/tools/news/article/2126-microsoft-tests-mai-realtime-a-full-duplex-voice-model-to-rival-openai-in","api_url":"https://techtools.cz/news-api/v1/articles/2126?lang=en","markdown_url":"https://techtools.cz/news-api/v1/articles/2126.md?lang=en","image_url":"https://storage.ghost.io/c/2a/1b/2a1b1782-8506-4d7d-bf53-ad3fb52e2a0f/content/images/size/w2000/2026/08/MAI-Playground-Microsoft-AI-08-02-2026_04_32_PM.jpg","word_count":136,"reading_time_minutes":1,"sources":[{"url":"https://www.testingcatalog.com/exclusive-microsoft-tests-new-mai-realtime-voice-model/","domain":"testingcatalog.com"}],"translation":{"lang":"cs","id":2199,"title":"Microsoft testuje MAI-Realtime, plně duplexní hlasový model, který má konkurovat OpenAI v Copilotu","url":"https://techtools.cz/tools/news/clanek/2199-microsoft-testuje-mai-realtime-plne-duplexni-hlasovy-model-ktery-ma-konkurovat","api_url":"https://techtools.cz/news-api/v1/articles/2199?lang=cs"},"content":"Microsoft has begun early-access testing of MAI-Realtime, a new bidirectional voice AI model built in-house for natural, full-duplex conversation inside Copilot. Unlike turn-based voice assistants, the model listens and speaks simultaneously, letting users interrupt mid-sentence with clean, low-latency handling.\n\nThe model supports 17 languages, including English, German, Japanese, Korean, Chinese, Arabic and Hindi, with automatic detection and mid-conversation switching. Testers describe its two available voices, Victoria and Grant, as noticeably more natural than Copilot's current voice mode. It offers configurable turn-taking, either a silence-based endpointer or Microsoft's own semantic MAI-Ears system.\n\nMAI-Realtime is currently limited to a small partner group inside the MAI Playground and has not been publicly launched. It slots alongside Microsoft's other in-house speech models, MAI-Transcribe-1 and MAI-Voice-1, marking a move away from dependence on OpenAI's GPT-Realtime model for voice functionality in Copilot."}}