Microsoft Ships MAI-Transcribe-1.5 with 2.4% WER

Microsoft AI released MAI-Transcribe-1.5, an in-house speech-to-text model supporting 43 languages. It achieves 2.4% word-error-rate on Artificial Analysis and best-in-class FLEURS accuracy. The model runs up to 5x faster on long audio, transcribing an hour in under 15 seconds. It integrates into Copilot, Teams, GitHub, and Dynamics 365.