Universal-3.5 Pro for pre-recorded audio: code-switching and contextual prompting in action

AssemblyAI has made its Universal-3.5 Pro speech-to-text model available for pre-recorded audio, positioning it as its recommended transcription option for meeting notes, post-call analysis, and other recorded-audio workflows at $0.21 per hour. The model supports native code-switching across 18 languages, automatically transcribing speakers’ language changes within sentences without configuration or separate language detection, as demonstrated with English paired with French, Hindi, and Mandarin. It also offers contextual prompting, allowing users to provide a brief natural-language description of an audio clip to improve recognition of specialized terms, names, and jargon, illustrated by correcting a misheard League of Legends reference to “I ban Azir.” Additional features include speaker diarization designed to identify short turns and overlapping speech, a Medical Mode for healthcare recordings, and integration with LLM Gateway for summarization and structured extraction.

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