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Top Voice AI companies are building with Assembly.
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Latest Release
Universal 3.5 Pro
Our new flagship speech-to-text model handles real-world audio the way it actually happens. Available for real-time and pre-recorded audio.
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Multilingual speech-to-text with speaker diarization, real-time transcription, and LLM integrations for intelligence out of the box—best-in-class word error rate from $0.15/hr.
Welcome back to the show—today we're joined by the team behind Northwind.
Thanks for having me. We process about 2 million minutes of audio a month.
That's a lot. Let's get into how you keep accuracy high at that scale.
Best-in-class word error rate and low latency on real-world audio and live streams, across 99 languages.
Identify and label speakers on every audio file, streaming or pre-recorded.
Pipe clean, formatted transcripts straight into LLMs for summarization, topic extraction, and downstream workflows.
36%
improvement in close rate
“The new Universal-3.5 Pro speech model from AssemblyAI is best so far in terms of accuracy, latency, and language switching.”
80%
increase in customer satisfaction
“Assembly has saved us countless hours managing models, and provided exceptional accuracy.”
36%
improvement in close rate
“The new Universal-3.5 Pro speech model from AssemblyAI is best so far in terms of accuracy, latency, and language switching.”
80%
increase in customer satisfaction
“Assembly has saved us countless hours managing models, and provided exceptional accuracy.”
Create a free account and transcribe any file with one API call. Test it in the no-code playground, then copy a ready-made request into your app. Usage-based pricing from $0.15/hr, no minimums.
Start building freeNo credit card required
Word error rate is the share of words the model gets wrong against a human reference—the standard measure of transcription accuracy on pre-recorded audio.
Pre-recorded word error rate on English audio.
*Lower is better*Source: AssemblyAI published benchmarks — assemblyai.com/benchmarks.
