IndexTTS 2.5

IndexTTS 2.5 API for text to speech at $0.00282 per second. Expressive speech with emotion and duration control. Call it on /v1/audio/speech and pay as you go in USD.

Get an API key Read the guide

Price: $0.00282
Unit: per second
Type: Text to speech
Endpoint: /v1/audio/speech

Pricing

$0.00282 per second

Seconds of output Estimated $0.02256

USD, charged from your prepaid balance at the listed price. List price; a few keys on special plans may differ. How billing works

What it does

Expressive speech with emotion and duration control

Model ID: indextts-2.5

API

POST /v1/audio/speech

Returns the result in the response. Set BIGMODEL_API_KEY to your API key first.

cURL

curl https://bigmodel.io/v1/audio/speech \
  -H "Authorization: Bearer $BIGMODEL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "indextts-2.5",
    "input": "Welcome to BigModel.io. One key for every model.",
    "voice": "VOICE_ID"
  }' \
  --output speech.mp3

Python, Node.js, every input field and error handling are in the guide. Guide →

Related models

All models of this type →