

Universal-3.5 Pro
Native code switching, better diarization, more languages.
What is Universal-3.5 Pro?
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.
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