All models / Video / HeyGen LiveAvatar (real-time conversational avatar)

HeyGen LiveAvatar (real-time conversational avatar)

Name: HeyGen LiveAvatar (real-time conversational avatar)
Brand: HeyGen
Price: 0.0032 USD
Availability: InStock

model id: heygen/liveavatar

Real-time · Text / audio in → Video out live-avatar

Hosts

Host	Price	Max session
Liveavatar	$0.0032 / s	120 s

0% additional markup beyond our 2.5% platform fee.

No live Playground for this model yet

This model streams from the host’s own SDK, and the browser half of that is yours to build. Switch to the API tab above for the session call, or see Live video & world models for the host’s browser example.

About

HeyGen LiveAvatar, real-time: a managed conversational avatar you video-call over LiveKit -- speech recognition, the LLM, the voice and the lip-synced avatar all run for you, steered by your own prompt and opening line (an AI interviewer, tutor or support agent). Pick a public avatar and voice, any language.

Price

$0.0032 / second

per second the session is live — about $11.69 per hour

Includes the VideoRouter platform fee of 2.5% of provider cost.

Specs

KindReal-time digital character

CreatorHeyGen

InputText / audio

OutputLive video stream

Resolution720p

Max session120 s

Min session10 s

How it works

Your server calls POST /v1/live-video/sessions with this model id. We check your key and credits, hold the cost of the session, and return a short-lived credential for the host.
Your browser or app streams from the host directly with that credential — the video never passes through our servers and the host API key never reaches the browser.
Your server sends a heartbeat while it runs and ends the session when the user leaves. You pay per second the session was live, up to 120 s per session.

Full reference, limits and errors: Live video & world models.

from videorouter_live import LiveVideo
lv = LiveVideo(api_key="llmr_sk_live_...")   # or set VIDEOROUTER_API_KEY

# On YOUR server: open a session, hand `connect` to the browser, settle on exit.
with lv.session(
    "heygen/liveavatar",
    max_duration_seconds=60,
) as s:
    send_to_browser(s.connect)      # returned once; short-lived credential for the host
    wait_for_user_to_finish()
print(s.status, s.billed_seconds, s.cost_usd)

import { LiveVideo } from "videorouter-live";
const lv = new LiveVideo({ apiKey: process.env.VIDEOROUTER_API_KEY });

// On YOUR server: open a session, hand `connect` to the browser, settle in a finally.
const session = await lv.withSession(
  {
    model: "heygen/liveavatar",
    maxDurationSeconds: 60,
  },
  async (session) => {
    await sendToBrowser(session.connect);   // returned once
    await waitForUserToFinish();
    return session;
  },
);
console.log(session.status, session.billedSeconds, session.costUsd);

curl https://videorouter.sh/api/v1/live-video/sessions \
  -H "Authorization: Bearer llmr_sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{"model": "heygen/liveavatar", "max_duration_seconds": 60}'

# keep it alive while the user streams, then settle:
curl -X POST https://videorouter.sh/api/v1/live-video/sessions/$SESSION_ID/heartbeat -H "Authorization: Bearer llmr_sk_live_..."
curl -X POST https://videorouter.sh/api/v1/live-video/sessions/$SESSION_ID/end -H "Authorization: Bearer llmr_sk_live_..."