Call the Fish Audio S2.1 Pro API for long-form text-to-speech. Up to 10,000 characters per request, $15 per 1M UTF-8 bytes, async polling and webhooks.
Fish Audio S2.1 Pro is a high-fidelity text-to-speech model built for long-form narration. Send up to 10,000 characters in one request and get back a natural-sounding MP3. Billed per UTF-8 byte of text.
About this model
Fish Audio S2.1 Pro is a high-fidelity text-to-speech model built for long-form narration. Through Muapi you call it with a single endpoint and receive a hosted MP3 asynchronously via polling or webhook.
Requests accept up to 10,000 characters, so whole scripts, chapters and articles can be voiced in one call. Pricing is metered on UTF-8 bytes of text.
Cost analysis
| Provider | Cost | Notes |
|---|---|---|
| muapiapp | $15 / 1M bytes | $15 per 1M UTF-8 bytes (~$0.015 per 1,000 English characters), matching Fish Audio's official API price. |
$15 per 1M UTF-8 bytes (~$0.015 per 1,000 English characters), matching Fish Audio's official API price.
** Competitor pricing is estimated based on similar model architectures and usage tiers.
Configuration schema
| Parameter | Type | Description | Default |
|---|---|---|---|
| Prompt | string | Text to speak (up to 10,000 characters). Billed per UTF-8 byte; non-Latin scripts use 3-4 bytes per character. | Welcome to the show. Today we look at how voice models have changed the way we tell stories. |
| Voice | Enum (1 options) | Voice to use for the narration. | voice_fish_narrator |
Text to speak (up to 10,000 characters). Billed per UTF-8 byte; non-Latin scripts use 3-4 bytes per character.
Welcome to the show. Today we look at how voice models have changed the way we tell stories.Voice to use for the narration.
voice_fish_narratorDeveloper documentation
prompt.voice_id (voice_fish_narrator)./api/v1/fish-s2-1-pro with your x-api-key; you receive a request_id./api/v1/predictions/{request_id}/result or pass a webhook URL.Frequently asked
Up to 10,000 characters per request.
$15 per 1 million UTF-8 bytes of text, matching Fish Audio's official API price. English text is about 1 byte per character (~$0.015 per 1,000 characters); non-Latin scripts use 3-4 bytes per character.
A hosted MP3 file.