Fish Audio

Fish Audio s1

Audio & Music

Expressive multilingual speech for conversational and narrative audio

from $0.02 / 1K UTF-8 bytes Fish Audio s1 API reference →
Model health Insufficient data
curl -X POST https://runapi.ai/api/v1/fish_audio/text_to_speech \
  -H "Authorization: Bearer $RUNAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "s1",
  "text": "Turn this short documentary narration into expressive, natural speech with consistent pacing."
}'
https://runapi.ai 1 endpoint

3 versions available

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Estimated: $0.02 / 1K UTF-8 bytes

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Specifications

Technical details

Provider Fish Audio
Model ID s1
Modality Audio & Music
Task types Synchronous
API endpoint /api/v1/fish_audio/text_to_speech
Billing unit 1K UTF-8 bytes
Input parameters bitrate_kbps, model, output_format, references, sample_rate_hz, text, voice_id
Output format mp3, wav
Catalog status Operational
HOW IT WORKS

Use This Model in 3 Steps

  1. Get Your Key

    Sign up for free and create an API key for s1 from the dashboard.

  2. Send a Request

    POST to /api/v1/fish_audio/text_to_speech with the s1 model slug and your parameters.

  3. Get Results

    Read the completed s1 response directly from the endpoint.

What this model offers

Flexible parameters

Configure 6 documented parameters, including bitrate_kbps, output_format, references, sample_rate_hz, text.

Endpoint coverage

Exposes 1 public endpoint(s): text_to_speech.

Usage-based billing

Metered by 1K UTF-8 bytes with no subscription requirement.

Fish Audio s1 Pricing

Endpoint
Resolution
Duration
Price
text_to_speech
Not available
1K UTF-8 bytes
$0.02 / 1K UTF-8 bytes
API REFERENCE

Endpoint Specification

Endpoint
POST /api/v1/fish_audio/text_to_speech
Model ID
s1
Task Types
text_to_speech
Max Duration
Unavailable
Resolutions
Unavailable
Aspect Ratios
Unavailable
Output Format
MP3, WAV
Avg Generation Time
Unavailable

Request parameters

text

Required value

No description available.

voice_id

Optional value

No description available.

references

Optional array

One temporary voice-cloning sample. Cannot be combined with voice_id. Omit, use null, or [] for no sample.

bitrate_kbps

Optional integer

MP3 bitrate. Not accepted for WAV output. (64, 128, 192)

output_format

Optional string

Output audio format. (mp3, wav)

sample_rate_hz

Optional integer

Output sample rate. MP3 supports 32000 and 44100 Hz; WAV supports every listed value. (8000, 16000, 24000, 32000, 44100)

USE CASES

Podcast & video scoring

Generate royalty-free background music matched to episode mood without licensing fees.

Game audio

Generate adaptive ambient soundscapes and effects for procedurally generated levels.

Ad voiceover & SFX

Generate custom voiceovers and sound effects for client spots without a recording studio.

FAQ

Frequently asked questions about Fish Audio s1

How do I select s1?

Pass the model ID shown in the quickstart.

What's the rate limit on this variant?

Per-key rate limits scale with your usage tier. The pricing page shows current limits. If you need higher throughput, contact support to discuss tier upgrades.

Can I switch variants later?

Yes. Variant is a parameter in the request. Switch by changing the model ID — no code changes, no re-authentication, no separate billing setup. All variants share the same API key and request shape.

Does it stream?

Where streaming is available, RunAPI streams end-to-end. LLM models support token-level streaming. Media models use async task polling or webhook callbacks for result delivery.

Where do I report quality issues?

Open an issue on the public GitHub repo or email support at [email protected]. Include the task ID and model ID so the team can investigate the specific generation.

Do I need a separate provider account?

No. Your RunAPI API key is enough to access this variant and every other model in the catalog. You do not need accounts with the underlying provider.

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