LLM APIs for Voice Agents: Latency, Streaming, Tools, and Conversation Design
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Voice AILLM APIRealtime AIAI Agents
Voice agents need faster responses than text chat. Even a few seconds of delay can feel awkward.
Key requirements
Voice systems need:
- low time to first token
- streaming output
- interruption handling
- short responses
- tool calls
- fallback
- transcript logging
Keep answers concise
Voice output should be shorter than written output. Long paragraphs are hard to listen to and increase latency.
Use tools for facts
Booking, account, inventory, and scheduling data should come from tools, not model memory.
Final thoughts
Voice agents require latency-aware model routing, short prompts, streaming, and careful conversation design.