OpenAI Speech

TTS-1

Text-to-speech with natural sounding voices

TTS Mode

6 Voices

MP3, OPUS, AAC Formats

Get API key — free View docs →

Model ID tts-1 /v1/audio/speech

Our pricing –20% vs official

Text-to-speech per 1K char

$0.026

Pay-as-you-go · No minimums · Cancel anytime

OpenAI-compatible ( api.belugapi.com/v1)

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No credit card required to test

Capabilities

What TTS-1
can do for you.

Native API parity with the official provider — every feature surfaced one-to-one.

OpenAI-compatible

Same SDKs, same payload, same response shape

Global edge

Routed through the lowest-latency path

Enterprise grade

SOC 2-aligned, no training on your data

Integration

2-line migration.
Zero friction.

BelugAPI is 100 % compatible with the OpenAI SDK. Point base_url to our endpoint and you're done — no refactoring, no learning curve.

Same request & response schema

Python · Node.js · REST · Go · Ruby

Synchronous & async invocation modes

Automatic failover & load balancing

Python

from openai import OpenAI

client = OpenAI(
  api_key=bel-your-key,
  base_url=https://api.belugapi.com/v1
)

speech = client.audio.speech.create(
  model=tts-1,
  voice=alloy,
  input=Hello from BelugAPI!
)
speech.stream_to_file(out.mp3)

Node.js

import OpenAI from openai;

const client = new OpenAI({
  apiKey:  bel-your-key,
  baseURL: https://api.belugapi.com/v1,
});

const speech = await client.audio.speech.create({
  model: tts-1,
  voice: alloy,
  input: Hello from BelugAPI!,
});

cURL

curl https://api.belugapi.com/v1/v1/audio/speech \
  -H Authorization: Bearer bel-your-key \
  -H Content-Type: application/json \
  -d {"model":"tts-1","voice":"alloy","input":"Hello from BelugAPI!"} \
  --output out.mp3

Highlights

Built for production.

Text-to-speech

Multi-voice

Natural sound

Speed control

Complete guide

Everything about
TTS-1.

Specifications, pricing, capabilities, and integration tips — kept up to date with every OpenAI release.

By OpenAI 2 min read Updated May 2026

OpenAI's text-to-speech model converting text into natural-sounding spoken audio using six built-in voices.

Overview

TTS-1 is a cutting-edge ai text-to-speech developed by OpenAI, designed to push the boundaries of artificial intelligence-powered content generation.

This model excels in 6 voices, natural audio, speed control, making it a top choice for professionals seeking high-quality, scalable AI solutions. Whether you're building production applications, researching new AI capabilities, or creating stunning visual content, TTS-1 delivers industry-leading performance and reliability.

Key Specifications

Specification	Details
Model Name	TTS-1
Provider	OpenAI
Category	AI Text-to-Speech
Model Type	Text To Speech

Pricing

Per 1K Chars: $0.015

Key Features & Capabilities

6 Voices: Advanced capability for professional-grade output.
Natural Audio: Advanced capability for professional-grade output.
Speed Control: Advanced capability for professional-grade output.

Use Cases & Applications

Audiobook narration
Voice assistant applications
Accessibility tools
Multilingual voice content

Frequently asked questions

What is TTS-1 best used for?

TTS-1 excels at 6 voices, natural audio, speed control, making it ideal for professional and enterprise applications.

Who developed TTS-1?

TTS-1 was developed by OpenAI, a leading AI research and development company.

How do I integrate TTS-1 into my application?

You can integrate TTS-1 via its official API endpoint using standard HTTP requests with your API key. SDKs are available for Python, JavaScript, and other languages.

What is the pricing model for TTS-1?

Pricing is based on per 1k chars. Check the pricing section above for detailed rates.

Ready to ship? Start using TTS-1 in under 30 seconds.

Get free API key