Some providers use different models for specific languages:
Providers
Text to Speech
Supported TTS providers in Calibrate
Documentation Index
Fetch the complete documentation index at: /llms.txt
Use this file to discover all available pages before exploring further.
Supported TTS providers in Calibrate
| Provider | Model | Default Voice | Website |
|---|---|---|---|
| Cartesia | sonic-3 | Riya | cartesia.ai |
| OpenAI | gpt-4o-mini-tts | coral | openai.com |
| Groq | orpheus | troy | groq.com |
| chirp_3 | Charon | cloud.google.com | |
| Gemini | gemini-3.1-flash-tts | Kore | ai.google.dev |
| ElevenLabs | eleven_multilingual_v2 | Krishna | elevenlabs.io |
| Sarvam | bulbul:v3-beta | aditya | sarvam.ai |
| Smallest AI | lightning | aditi | smallest.ai |
| Provider | Language | Model |
|---|---|---|
| Sindhi | gemini | |
| ElevenLabs | Sindhi | eleven_v3 |
# Cartesia
export CARTESIA_API_KEY=your_key
# Google
export GOOGLE_APPLICATION_CREDENTIALS=/path/to/credentials.json
# Gemini (benchmarks only; STT + TTS via the Gemini API)
export GOOGLE_API_KEY=your_key
# OpenAI
export OPENAI_API_KEY=your_key
# ElevenLabs
export ELEVENLABS_API_KEY=your_key
# Sarvam
export SARVAM_API_KEY=your_key
# Groq
export GROQ_API_KEY=your_key
# Smallest
export SMALLEST_API_KEY=your_key