Model dossier

AssemblyAI: Universal-3.5 Pro

Universal-3.5 Pro is AssemblyAI's speech-to-text model served through its Sync API, returning a complete transcript with word-level timestamps in a single synchronous response for audio clips up to 120 seconds....

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Identity

AssemblyAI: Universal-3.5 Pro

Model ID: assemblyai/universal-3-5-pro
Canonical slug: assemblyai/universal-3-5-pro-20260914
Knowledge cutoff: n/a
Created: 9/22/2026

Capabilities

audiotranscription

Modalities

audio->transcriptionaudiotranscription

Capacity

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