Activefastaudio Proprietary

TTS-1

by OpenAI· Released November 2023

TTS-1 is OpenAI's text-to-speech model that converts text into natural-sounding spoken audio. It supports multiple voices and languages, offering low-latency streaming for real-time applications. As part of OpenAI's audio API, it provides a cost-effective solution for generating high-quality speech.

Official Site API Docs

Input cost

$15.00 per 1M characters

Output cost

—

Context window

—

Max output

—

Modalities

audio

License

proprietary

Capabilities

Text-to-SpeechMultiple VoicesMultiple LanguagesStreamingLow Latency

Best For

Converting text into natural-sounding speech for applications like voice assistants, audiobooks, and content narration.

Strengths

Natural and expressive speech output
Low latency for real-time streaming
Supports multiple voices and languages
Cost-effective pricing per character

Limitations

Limited to audio output only (no video or image generation)
Voice customization options are limited compared to some competitors
May not handle complex emotional tones as well as human voice actors

Use Cases

Voice assistants and chatbots

Audiobook and podcast narration

Accessibility tools for visually impaired users

Language learning and pronunciation practice

Content creation for videos and presentations

Automated customer service responses

Real-time translation and dubbing

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