ElevenLabs Performance Tuning

Overview

Optimize ElevenLabs TTS latency and throughput through model selection, streaming strategies, audio format tuning, and caching. Latency ranges from ~75ms (Flash) to ~500ms (v3) depending on configuration.

The two highest-leverage, lowest-effort levers — model choice (Step 1) and output format (Step 2) — are documented inline below. The four deeper integrations (HTTP streaming, WebSocket streaming, caching, parallel generation) are summarized here with copy-ready code in the full implementation walkthrough.

Prerequisites

• ElevenLabs SDK installed (@elevenlabs/elevenlabs-js)
• An ElevenLabs API key exported as ELEVENLABS_API_KEY (used by the SDK and passed as xi_api_key on the WebSocket handshake)
• Understanding of your latency requirements
• Audio playback infrastructure (browser, mobile, server-side)

Instructions

Step 1: Model Selection for Latency

The single biggest performance lever is model choice: