Text to speech
Lightning
V3.1
v3.1 Pro
$0.175
Per 10K characters
Sub 100ms time-to-first-audio.
Auto detect and switch between 14+ languages.
Instantly clone your voice from just 5 seconds of audio.
Native sample rate of 44.1 kHz.
Speech to text
Pulse
Batch
Pro
Realtime
Starts at
$0.003
Price per minute
5.42% word error rate.
22+ Languages Supported.
Automatically identifies speakers, timestamps, and sensitive data protection.
Speech to speech
Hydra
V3.1
v3.1 Pro
Currently in beta
Speak naturally with true speech-to-speech AI.
Interrupt anytime with seamless full-duplex conversations.
Built to deliver fluid, real-time voice experiences.
Get faster tool calls that keep conversations moving.
Small language model
Electron
Enterprise only
Custom pricing
Built for real-time voice conversations.
Speaks 70+ languages naturally, with strong support for Indic languages.
Works with your existing OpenAI integrations out of the box.
Detailed models pricing
Frequently
asked questions
How is API usage billed?
Is text-to-speech billed per character or per request?
What's the difference between Lightning v3.1 and v3.1 Pro?
Should I use Pulse or Pulse Pro?
What is Hydra, and when should I use it?
How much do phone numbers cost?
Does voice cloning cost extra, and which model supports it?
Is there a rate limit on API calls?
Can I self-host or deploy on-premise?
Do you retain my audio?