# AssemblyAI Universal 3.5 Pro shows 1.93% word error rate in a 15-model test

Tarush Agarwal reported a speech-to-text benchmark of 15 models on the same audio and pipeline. On 1,000 read-aloud clips from Pipecat FLEURS, AssemblyAI Universal 3.5 Pro had a 1.93% word error rate and a 489 ms median time to first text, both the best results in that test.

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Source: Tarush Agarwal · Published 9/23/2026, 22:34:13

Tarush Agarwal reported that a speech-to-text benchmark ran 15 models through the same audio and pipeline. On 1,000 read-aloud clips from Pipecat FLEURS, AssemblyAI Universal 3.5 Pro had the lowest word error rate at 1.93% and the fastest median time to first text at 489 ms. The measurements are in the [speech-to-text benchmark results](https://benchmarks.cekura.ai/stt).

Tags: Speech-to-text, AssemblyAI, Benchmark, Universal 3.5 Pro

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