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AssemblyAI guides building real-time voice agents with STT-LLM-TTS architecture

By PulseAugur Editorial · [4 sources] ·

AssemblyAI is detailing how to build real-time voice agents using a chained architecture that connects speech-to-text (STT), large language models (LLMs), and text-to-speech (TTS) components. The company emphasizes the importance of low-latency streaming pipelines, with specific guidance on integrating their Universal 3.5 Pro Realtime STT model. The articles also explore different orchestration platforms like Vapi, Pipecat, and LiveKit, and discuss lessons learned from companies like Retell and Super regarding production-level voice agent demands, including latency budgets and evaluation metrics beyond simple word error rates. AI

IMPACT Provides practical guidance and architectural insights for developers building real-time voice applications.

RANK_REASON The articles focus on practical implementation and comparison of tools for building voice agents, rather than a new model release or core research.

Read on AssemblyAI blog →

AI-generated summary · Google Gemini · from 4 sources. How we write summaries →

AssemblyAI guides building real-time voice agents with STT-LLM-TTS architecture

COVERAGE [4]

  1. AssemblyAI blog TIER_1 English(EN) ·

    Build a voice agent with a chained STT

    Voice agent architecture explained: learn how STT, LLM, TTS, and orchestration work together in a low-latency streaming pipeline for natural voice interactions.

  2. AssemblyAI blog TIER_1 English(EN) ·

    What it takes to build smarter voice agents: lessons from Retell and Super

    Retell and Super on building production voice agents: cascading vs. speech-to-speech, latency budgets, evaluation beyond WER, context, and provider fallbacks.

  3. AssemblyAI blog TIER_1 English(EN) ·

    Voice Agent Orchestrators Compared: Vapi vs Pipecat vs LiveKit with AssemblyAI

    Compare Vapi, Pipecat, and LiveKit on orchestration model, transport, and speech-to-text control, plus when to skip the orchestration layer entirely.

  4. AssemblyAI blog TIER_1 English(EN) ·

    Tutorial: How to easily build a voice agent with AssemblyAI

    Build a real-time AI voice agent in Python using AssemblyAI streaming transcription, GPT-4, and ElevenLabs, with full code and sub-second latency targets.

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