Definition
Voice agent is a voice agent is an AI system you talk to out loud that listens, decides what to do and answers in speech, often handling tasks like phone calls, bookings or support.
A voice agent is an AI agent you speak with instead of type to. It hears you, works out what you want, can take actions on your behalf, and replies in a spoken voice. Businesses use them to answer phones, book appointments, qualify sales leads and handle routine support.
Most voice agents chain three parts together, often in a loop that runs in a second or less:
Some newer systems skip the middle steps and take in and produce audio directly with a single multimodal model. Either way, the goal is the same: a conversation that feels natural.
If you pay for a voice product, pricing is typically per minute of conversation, bundling listening, thinking and speaking. That makes the cost of a call predictable, but long calls and heavy volume add up quickly. Always test with real audio from your own customers, not a clean demo.
A dental office uses a voice agent on its main line. A caller asks to move a Thursday cleaning. The agent checks the schedule, offers two slots, confirms one and sends a text reminder, all without a person picking up.
Voice agents inherit the weaknesses of language models, including hallucination, so it is wise to limit what they are allowed to promise.
A voice agent is an AI system you talk to that listens, decides what to do, can take actions, and replies in spoken audio.
Typically speech recognition converts your speech to text, a language model decides the response and any actions, and text-to-speech speaks the reply, all within about a second.
Mistral released Voxtral 3 on Oct. 20: new transcription and speech models plus a voice agent API at $0.04 a minute when it reasons with Mistral Small 4. Skip the benchmark charts. The per-minute price and the choice of where audio is processed are the story.