AssemblyAI Sync API Delivers Transcripts in 134ms for Clips Under 2 Minutes

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AssemblyAI now offers two distinct paths for transcribing pre-recorded audio: an asynchronous method and a newer synchronous API. The async approach submits a job and returns a complete transcript via polling or webhook, handling files of any length at $0.21 per hour. The sync API, priced at $0.45 per hour, returns a transcript within the same HTTP response at a median latency of around 134 milliseconds, but is limited to clips of up to two minutes or 40 MB. Both methods use the Universal-3.5 Pro model and deliver comparable transcription accuracy, differing mainly in speed and file-length support. The sync option is designed for interactive applications where a user or automated agent is actively waiting for a near-instant result.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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