How do I use TTS-1 HD from inside Iran?

Create a Hormouz account and generate an API key. Hormouz gives you a stable route to the model from inside Iran, with no foreign credit card or circumvention tooling needed.

Which voices does it have?

Nine built-in voices: alloy, ash, coral, echo, fable, nova, onyx, sage and shimmer. They read Persian as well as English and many other languages.

OpenAI: TTS-1 HD: audio model

TTS-1 HD is OpenAI's higher-quality text-to-speech model, for audio where clarity matters more than speed. Reachable from inside Iran through Hormouz.

Pricing:: $30/M characters
Type:: audio

Audio

TTS-1 HD is the higher-quality sibling of TTS-1, with the same nine voices. It produces cleaner audio for narration, audiobooks, e-learning and published content, at twice TTS-1's price per character.

Hormouz serves TTS-1 HD on two endpoints: the OpenAI-compatible /v1/audio/speech, which returns the audio in the same response, and /v1/predictions for background jobs. Set voice to one of the model's own voices, for example "shimmer", and response_format to mp3 or pcm. Each request takes up to 4,096 characters of text.

Billing is per character of input text; the current rate is in the price table on this page, and you pay only for what you use. Hormouz provides stable access to it from inside Iran, with no foreign credit card or circumvention tooling required.

OpenAI's higher-quality text-to-speech model.

Quickstart

curl https://api.hormouz.net/v1/audio/speech \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/tts-1-hd","voice":"alloy","input":"Hello from Hormouz.","response_format":"mp3"}' \
  --output speech.mp3

Specs

Vendor	OpenAI
Type	Audio
Context window	—
Pricing	$30/M characters
API	speech

Code example

cURL

curl https://api.hormouz.net/v1/audio/speech \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/tts-1-hd","voice":"alloy","input":"Hello from Hormouz.","response_format":"mp3"}' \
  --output speech.mp3

Python

from openai import OpenAI
client = OpenAI(api_key="ng-YOUR_API_KEY", base_url="https://api.hormouz.net/v1")
with client.audio.speech.with_streaming_response.create(
    model="openai/tts-1-hd",
    voice="alloy",
    input="Hello from Hormouz.",
    response_format="mp3",
) as resp:
    resp.stream_to_file("speech.mp3")

JavaScript

import OpenAI from "openai";
import { writeFile } from "node:fs/promises";
const client = new OpenAI({ apiKey: "ng-YOUR_API_KEY", baseURL: "https://api.hormouz.net/v1" });
const speech = await client.audio.speech.create({
  model: "openai/tts-1-hd",
  voice: "alloy",
  input: "Hello from Hormouz.",
  response_format: "mp3",
});
await writeFile("speech.mp3", Buffer.from(await speech.arrayBuffer()));

Buy the OpenAI: TTS-1 HD API, paid in rial

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One Hormouz key reaches OpenAI: TTS-1 HD and 600+ other models, and you pay only for what you use.
No VPN and no risk of a banned account; just change the base URL to api.hormouz.net/v1.

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FAQ

How much does TTS-1 HD cost?: Billing is per character of input text; the current rate is in the price table on this page, and you pay only for what you use.
How do I use TTS-1 HD from inside Iran?: Create a Hormouz account and generate an API key. Hormouz gives you a stable route to the model from inside Iran, with no foreign credit card or circumvention tooling needed.
How do I call TTS-1 HD?: Hormouz serves TTS-1 HD on two endpoints: the OpenAI-compatible /v1/audio/speech, which returns the audio in the same response, and /v1/predictions for background jobs. Set voice to one of the model's own voices, for example "shimmer", and response_format to mp3 or pcm. Each request takes up to 4,096 characters of text. Code written for OpenAI's SDK works by changing only the base URL; the bare model id is accepted too.
Which voices does it have?: Nine built-in voices: alloy, ash, coral, echo, fable, nova, onyx, sage and shimmer. They read Persian as well as English and many other languages.

Updated 2026-10-13