Ultravox.ai
Build smarter AI voice agents with the best speech recognition technology
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What is Ultravox.ai?
Overview Socials: Ultravox is a real-time voice AI platform for building fast, fluent conversational experiences.
With developer-friendly APIs, agentic-ready primitives, and a speech-native model, Ultravox makes it easy to build voice agents that follow instructions reliably, interact with third-party systems effectively, and communicate naturally.
Legacy voice AI systems orchestrate a series of independent component services that form a connected pipeline, which is subject to unpredictable latency. Ultravox controls and manages our entire inference stack and infrastructure, so we can guarantee reliability and availability at scale.
Each voice AI call through Ultravox Realtime is assigned dedicated GPU resources for the entire lifespan of the call, ensuring a consistent low-latency experience regardless of demand on our system, even for users with thousands of concurrent calls.
Join thousands of teams building natural, conversational voice AI agents with Ultravox. Show more
Who is Ultravox.ai for?
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Ultravox Team In the v0.7 series, the Ultravox model is trained on GLM 4.6, taking the lead on audio reasoning tasks over closed source models like gpt4o-audio, while retaining advantages in speech understanding from previous versions. Ultravox is a multimodal model that can consume both speech and text as input (e.g., a text system prompt and voice user message). The input to the model is given as a text prompt with a special pseudo-token, and the model processor will replace this magic token with embeddings derived from the input audio. Using the merged embeddings as input, the model will then generate output text as usual. 0 0
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