AssemblyAI - Speech-to-Text API

In plain words

AssemblyAI provides speech-to-text APIs that automatically transcribe and understand audio and video content. Designed for developers integrating transcription capabilities into their products, it uses advanced AI models to deliver accurate results. The service is built for technical teams looking to add audio processing functionality to applications without building transcription systems from scratch.

written from the facts on this page · September 2026

From the sources

Speech-to-Text APIs to accurately and automatically transcribe and understand audio/video in your product. Powered by advanced AI models.

Universal-3.5 Pro is our flagship async speech-to-text model: native code-switching across 18 languages, our most accurate speaker diarization yet, and contextual prompting — at $0.21/hr.

Models, APIs, and infrastructure in one place. Build voice into any product, on any stack. Zoom leverages AssemblyAI to help advance its AI research and development. Siro achieves a 90% reduction in customer complaints and support tickets. Our new flagship speech-to-text model handles real-world audio the way it actually happens. Available for real-time and pre-recorded audio. Models, APIs, and infrastructure in one place. Build voice into any product, on any stack. Zoom leverages AssemblyAI to help advance its AI research and development. Siro achieves a 90% reduction in customer complaints and support tickets. Our new flagship speech-to-text model handles real-world audio the way it…from assemblyai.com

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