
Universal-3.5 Pro is AssemblyAI's most accurate speech-to-text model, now available at our Realtime & Async endpoints. It transcribes every conversation exactly as it's heard—code-switching across 18 languages, our most accurate speaker diarization yet, and contextual prompting to steer results.
Universal-3.5 Pro is AssemblyAI's advanced speech-to-text model, offering high accuracy in transcription across 18 languages. It features real-time and asynchronous endpoints, improved speaker diarization, and contextual prompting capabilities.