Name: TTS-1 HD | Text to speech API
Brand: OpenAI

Overview

What is TTS-1 HD API?

TTS-1 HD is a high-quality text-to-speech model that provides superior audio quality compared to TTS-1.

Technical Specifications
- Supported inputs: Text
- Output: Audio
- Endpoint: /tts

Performance Benchmarks
[embed]

TTS-1 HD API Pricing
- Input: $39 / 1M tokens

Where to Use TTS-1 HD

Voiceovers and narration
Generate natural speech for videos, courses, and IVR at low per-second cost.

Accessibility and voice agents
Add spoken output to apps, readers, and conversational assistants.

Uptime and performance

Uptime (7d): 100%

Measured on the AI/ML API gateway across live traffic. Figures are medians unless stated. Last updated 2026-10-12.

Use cases

Blog content narration for enhanced accessibility and engagement.
Real-time voice streaming in interactive services, webinars, and podcasts.
Offline voice generation for audiobooks, announcements, and automated messages.
Multilingual voice assistants and customer support bots.
Accessibility tools including screen readers and learning aids.

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How to use TTS-1 HD | Text to speech API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to openai/tts-1-hd.

import requests

r = requests.post(
    "https://api.aimlapi.com/v1/tts",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "openai/tts-1-hd",
      "text": "Hello from AI/ML API",
      "voice": "alloy"
    },
)
print(r.json()["audio"])  # URL to the generated audio

const r = await fetch("https://api.aimlapi.com/v1/tts", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "openai/tts-1-hd",
    "text": "Hello from AI/ML API",
    "voice": "alloy"
  }),
});
const { audio } = await r.json();
console.log(audio); // URL to the generated audio

curl -X POST https://api.aimlapi.com/v1/tts \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/tts-1-hd","text":"Hello from AI/ML API","voice":"alloy"}'

# the JSON response contains "audio" — a URL to the generated speech

OpenAI-compatible — swap the base URL and it works with your existing SDK.