AssemblyAI – Accurate real-time streaming speech-to-text for voice agents

Summary: AssemblyAI’s Universal-3 Pro Streaming is a real-time speech-to-text model designed for voice agents, handling disfluencies, code-switching, and noisy environments with low latency. It supports over 99 languages and includes entity detection and speaker diarization in a single API.

What it does

It transcribes speech in real time with features like speaker labels, entity detection, and code switching, optimized for complex audio scenarios such as multi-party calls and noisy backgrounds.

Who it's for

Developers building voice agents that require accurate transcription in challenging conditions and multiple languages.

Why it matters

It addresses common failures in voice agents by improving accuracy on edge cases like credit card numbers, turn detection, and speaker identification.