ByteDanceText to Speech/v1/media/queue

Seed Audio 1.0 API

Seed Audio 1.0 text to speech — speech and audio from a natural-language prompt, billed on input length.

ByteDance Seed's non-streaming audio generation model. Produces speech and other audio from a natural-language prompt that describes the voice, tone, and sound you want.

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Seed Audio 1.0 API pricing

Pay per request from your YepAPI balance — no subscription, no monthly minimum. Prices updated October 23, 2026.

Billing	Price
Rate	$0.8440/1K chars

What it costs	Per job
Short reply200 characters	$0.169
Blog post narration10,000 characters (~1,600 words)	$8.44
Audiobook chapter100,000 characters	$84.40

2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Playground coming soon — use the API endpoint directly with your API key.

Seed Audio 1.0 specs

Provider	ByteDance
Model ID	bytedance-seed/seed-audio-1-0
Endpoint	/v1/media/queue
Type	Text to Speech
Output formats	mp3

How to get a Seed Audio 1.0 API key

1
Create a free account
Sign up at yepapi.com with Google or email. It takes about 30 seconds and needs no card.
2
Create an API key
Open the dashboard, go to API Keys and create a key. Copy it — it starts with yep_sk_.
3
Call Seed Audio 1.0
Send a request to /v1/media/queue with the x-api-key header and model "bytedance-seed/seed-audio-1-0".
4
Pay as you go
Usage is billed per request from your balance. Top up any amount; there is no subscription.

Strengths

✓

Speech and other audio

Generates speech and other audio, not only a voice reading text.

✓

Voice described in the prompt

Describe the voice you want in plain language instead of picking from a fixed list.

✓

Tone and sound direction

The same prompt can set the tone and the sound of the result.

✓

Non-streaming

Returns the finished audio once generation completes, which fits the async media queue.

Quick start

Copy this snippet and start making calls with Seed Audio 1.0.

// Step 1: Submit job
const res = await fetch('https://api.yepapi.com/v1/media/queue', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "bytedance-seed/seed-audio-1-0",
    "prompt": "A warm, unhurried male narrator with a slight rasp, speaking close to the microphone: The last train left at midnight, and nobody saw who got off."
  }),
});
const { data } = await res.json();
const jobId = data.jobId;

// Step 2: Poll for result
const status = await fetch(`https://api.yepapi.com/v1/media/status/${jobId}`, {
  headers: { 'x-api-key': 'YOUR_API_KEY' },
});
const { data: job } = await status.json();
// job.status: "pending" | "processing" | "completed" | "failed"
// job.result: { text?, image?, audio?, video? }

Seed Audio 1.0 vs similar models

Every model below runs on the same API key — switch by changing the model ID.

Model	Provider	Price
Seed Audio 1.0	ByteDance	$0.8440/1K chars
Kokoro 82M	hexgrad	$0.0014/1K chars
Fish Audio Drama 3	Fish Audio	$0.0042/1K chars
HeyGen Voice Turbo	HeyGen	$0.0084/1K chars
Sesame CSM 1B	Sesame	$0.0148/1K chars
Voxtral TTS 3	Mistral	$0.0302/1K chars
MAI-Voice-2.1 Flash	Microsoft	$0.0316/1K chars
HeyGen Voice	HeyGen	$0.0316/1K chars

Why use Seed Audio 1.0 through YepAPI?

✓One API key for all models — no separate accounts

✓No monthly minimums — pay per call

✓Switch models with one line of code

✓Simple REST API — works from any language

✓Unified billing across all providers

✓No rate limits for most use cases

Seed Audio 1.0 API — audio from a natural-language prompt

Seed Audio 1.0 is ByteDance Seed's non-streaming audio generation model. It produces speech and other audio from a natural-language text prompt that can describe the desired voice, tone, and sound.

There is no voice list — the description in the prompt does that job. On YepAPI it runs through the media queue, billed at $0.8440 per 1,000 characters of input, description included.

Start generating in 30 seconds

$5 free credit on signup. No credit card required. Pay per call.

Get API Key

What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
Marcus T.
SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
Priya S.
Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Jake R.
Indie Hacker

Frequently asked questions

ByteDance Seed's non-streaming audio generation model. Produces speech and other audio from a natural-language prompt that describes the voice, tone, and sound you want.

Seed Audio 1.0 costs $0.8440/1K chars through YepAPI, billed per request with no monthly fee. For example, a short reply (200 characters) costs about $0.169.

Sign up at yepapi.com (Google or email, about 30 seconds), open the dashboard and create an API key. The same key works for Seed Audio 1.0 and every other model — no separate ByteDance account or waitlist.

New YepAPI accounts in most countries get free signup credit, enough to test Seed Audio 1.0 without a card. After that you pay per request at the rates above — there is no subscription.

Use "bytedance-seed/seed-audio-1-0" as the model on /v1/media/queue. The short alias "seed-audio" also works.

Ready to use Seed Audio 1.0?

$5 free credit on signup. No credit card required. Pay per call.

Get API Key — Free $5 Credit Read Docs

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