How do I use Fish Audio S2.1 Pro Free 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.

Can I use Fish Audio S2.1 Pro Free in production?

It is meant for testing and low volume: it carries no latency or availability guarantee. For production traffic, use Fish Audio S2.1 Pro.

Fish Audio: S2.1 Pro Free (free): audio model

S2.1 Pro Free is the no-cost variant of Fish Audio S2.1 Pro, for testing, prototyping and low-volume use. Reachable from inside Iran through Hormouz.

Pricing:: Free
Type:: audio

Audio

S2.1 Pro Free is the no-cost variant of Fish Audio's S2.1 Pro text-to-speech model, intended for testing, prototyping and low-volume applications.

It offers the same synthesis as S2.1 Pro, including natural-language style controls, but without production latency or availability guarantees. Hormouz serves Fish Audio S2.1 Pro Free on two endpoints: the OpenAI-compatible /v1/audio/speech, which returns the audio in the same response, and /v1/predictions for background jobs. Set response_format to mp3 or pcm.

This variant is free of charge. It is meant for testing and prototyping and carries no latency or availability guarantee. Hormouz provides stable access to it from inside Iran, with no foreign credit card or circumvention tooling required.

S2.1 Pro Free is the no-cost variant of Fish Audio S2.1 Pro, intended for testing, prototyping, and low-volume applications. It provides the same synthesis capabilities without production latency or availability...

Quickstart

curl https://api.hormouz.net/v1/audio/speech \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"fish-audio/s2.1-pro-free:free","voice":"eve","input":"Hello from Hormouz.","response_format":"mp3"}' \
  --output speech.mp3

Specs

Vendor	Fish Audio
Type	Audio
Context window	—
Pricing	Free
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":"fish-audio/s2.1-pro-free:free","voice":"eve","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="fish-audio/s2.1-pro-free:free",
    voice="eve",
    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: "fish-audio/s2.1-pro-free:free",
  voice: "eve",
  input: "Hello from Hormouz.",
  response_format: "mp3",
});
await writeFile("speech.mp3", Buffer.from(await speech.arrayBuffer()));

Buy the Fish Audio: S2.1 Pro Free (free) API, paid in rial

Buy credit with an Iranian bank card; no foreign card or account needed.
One Hormouz key reaches Fish Audio: S2.1 Pro Free (free) 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 Fish Audio S2.1 Pro Free cost?: This variant is free of charge. It is meant for testing and prototyping and carries no latency or availability guarantee.
How do I use Fish Audio S2.1 Pro Free 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 Fish Audio S2.1 Pro Free?: Hormouz serves Fish Audio S2.1 Pro Free on two endpoints: the OpenAI-compatible /v1/audio/speech, which returns the audio in the same response, and /v1/predictions for background jobs. Set response_format to mp3 or pcm.
Can I use Fish Audio S2.1 Pro Free in production?: It is meant for testing and low volume: it carries no latency or availability guarantee. For production traffic, use Fish Audio S2.1 Pro.

Updated 2026-10-13