AssemblyAI Universal 3.5 ProvsZoom Scribe Pro

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Accuracy and speed

Left gets fewer words wrong. Lower has the final text ready sooner.

Accurate and fast0ms200ms400ms600ms800ms0%2%4%6%8%Words wrong on clean audio (Pipecat WER)
  • Universal 3.5 Pro1.93% · 180ms
  • Scribe Pro1.96% · 162ms

AssemblyAI Universal 3.5 Pro is ahead on time to first text, and Zoom Scribe Pro on final-text delay. The Pipecat Dataset and The Ocular Dataset are too close to call. AssemblyAI Universal 3.5 Pro has a newer release: AssemblyAI Universal 3.6 Pro vs Zoom Scribe Pro.

Last updated Methodology by Dileep Chagam

Who is better at what

Universal 3.5 ProScribe Pro
  • Pipecat Dataset WER1.93%1.96%
  • Ocular Dataset WER4.23%4.84%
  • Time to first text489ms1.70s
  • Final-text delay180ms162ms

Lower is better on every measure. Too close to call means the likely ranges overlap.

Universal 3.5 Pro vs Scribe Pro FAQ

  • AssemblyAI Universal 3.5 Pro and Zoom Scribe Pro are too close to call on accuracy. On the 1,000 public Pipecat clips, AssemblyAI Universal 3.5 Pro scores 1.93% and Zoom Scribe Pro 1.96%, with likely ranges of 1.69 to 2.18% and 1.73 to 2.20%. The ranges overlap, so the difference is too close to call. On the eight licensed Ocular recordings, AssemblyAI Universal 3.5 Pro scores 4.23% and Zoom Scribe Pro 4.84%, with likely ranges of 3.57 to 4.68% and 4.23 to 5.43%. The ranges overlap, so the difference is too close to call. Word error rate counts incorrect, missing, and extra words, so lower is better.

  • No. Zoom Scribe Pro finishes the transcript 18ms sooner. AssemblyAI Universal 3.5 Pro has the final transcript 180ms after the speaker stops and Zoom Scribe Pro 162ms, at the median. Both are measured on the same 206 streamed turns.

  • Zoom Scribe Pro finishes the transcript 18ms sooner, and the two are too close to call on real conversations. A voice agent cannot reply until the final transcript arrives, and the Ocular recordings are real conversations.

  • Yes, both return partial text before the speaker stops. AssemblyAI Universal 3.5 Pro shows first text after 489ms and Zoom Scribe Pro after 1.70s, at the median, so AssemblyAI Universal 3.5 Pro is 1.21s sooner.