Text-to-speech playground

Seed Audio 1.0 API

ByteDance expressive speech with sound effects, from a single script.

Seed Audio 1.0 is a text-to-speech model from ByteDance, available on OttoPort's OpenAI-compatible API as the model ID seed-audio-1.0 at $0.329 / request as of 2026-10-14.

Provider

ByteDance

Price

$0.329 / request

Model ID

seed-audio-1.0

Type

text-to-speech model

VoiceoversProduct narrationConversational audio

Create with Seed Audio 1.0

tts

ScriptVoice (optional)

Your result appears here

Start with the example prompt or make it your own. Your OttoPort account is used securely for generation.

Pricing

Seed Audio 1.0 API pricing

What OttoPort bills for Seed Audio 1.0, and what that works out to per unit. Rates are read from the same catalog the gateway meters against, and were current on 2026-10-14.

Per request	$0.329	any script length, one flat rate
Requests per $10	30
100 requests	$32.90

No subscription and no minimum — OttoPort bills prepaid credits against usage. See the full rate card.

Quickstart

Call Seed Audio 1.0 in three lines

Send "model": "seed-audio-1.0" to POST https://ottoport.ai/api/v1/audio/speech with an OttoPort key. No ByteDance account, no waitlist, no separate SDK.

curl https://ottoport.ai/api/v1/audio/speech \
  -H "Authorization: Bearer $OTTOPORT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seed-audio-1.0",
    "input": "Welcome to OttoPort.",
    "format": "mp3"
  }' --output speech.mp3

import requests

audio = requests.post(
    "https://ottoport.ai/api/v1/audio/speech",
    headers={"Authorization": "Bearer " + API_KEY},
    json={"model": "seed-audio-1.0", "input": "Welcome to OttoPort.", "format": "mp3"},
)
open("speech.mp3", "wb").write(audio.content)

const res = await fetch("https://ottoport.ai/api/v1/audio/speech", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "seed-audio-1.0",
    input: "Welcome to OttoPort.",
    format: "mp3",
  }),
});
const buffer = Buffer.from(await res.arrayBuffer());

Before you start

1. Create a key at /api-keys.
2. Top up credits — the smallest pack is $25.
3. Paste the request. It returns on the same request.

Full reference at /docs, or drive it from an agent with the MCP server and CLI.

Reference

Request parameters

The body POST https://ottoport.ai/api/v1/audio/speech accepts for Seed Audio 1.0.

Field	Type	Required	Notes
model	string	Yes	Always seed-audio-1.0 for Seed Audio 1.0.
input	string	Yes	Text to speak. Billed per request, whatever its length.
voice	string	No	Provider voice identifier.
format	string	No	Audio container, e.g. `mp3`.

Comparison

Seed Audio 1.0 direct vs through OttoPort

Seed Audio 1.0 is the same model either way — what changes is how many accounts, keys, and integrations you carry to reach it.

	ByteDance direct	Via OttoPort
Accounts and keys	A ByteDance account, plus one more for every other model you add	One OttoPort account and one key for the whole catalog
Request shape	ByteDance's own SDK and response format	OpenAI-compatible — point baseURL at OttoPort and change the model string
Switching models	A new integration per provider	Replace seed-audio-1.0 with any other model ID in the catalog
Billing	A separate invoice and contract per provider	Prepaid credits, no subscription, one usage ledger
Provider outages	Your call fails	Configured backup routes are tried in order on provider failure

Write for the ear, not the page.

Use punctuation to guide pauses.

Keep each generation focused on one tone.

FAQ

Seed Audio 1.0 API questions

Cost, keys, and model IDs for Seed Audio 1.0 on OttoPort.

How much does the Seed Audio 1.0 API cost?

On OttoPort, Seed Audio 1.0 costs $0.329 / request as of 2026-10-14. For scale, requests per $10: 30. Billing is prepaid usage with no subscription and no minimum, and the current rate is always published at ottoport.ai/pricing.

How do I get a Seed Audio 1.0 API key?

You do not need a ByteDance key. Create an OttoPort account, generate a key at ottoport.ai/api-keys, and send it as "Authorization: Bearer <key>" to POST https://ottoport.ai/api/v1/audio/speech with "model": "seed-audio-1.0". The same key reaches every other model in the catalog.

What is the model ID for Seed Audio 1.0?

The OttoPort model ID for Seed Audio 1.0 is seed-audio-1.0. Pass it as the model field on POST https://ottoport.ai/api/v1/audio/speech, or list it programmatically from GET https://ottoport.ai/api/v1/models.

Do I need a ByteDance account to use Seed Audio 1.0?

No. OttoPort connects to ByteDance on your behalf, so one OttoPort account covers Seed Audio 1.0 and every other model in the catalog — no per-provider contracts, keys, or invoices.

Alternatives

Other text-to-speech models on the same API

Same endpoint, same key — swapping model is a one-string change from seed-audio-1.0.

MiniMax Speech 2.8 Turbo API

MiniMax

$72.79 / 1M characters

MiniMax Speech 2.8 HD API

MiniMax

$121.32 / 1M characters

ElevenLabs v3 API

ElevenLabs

$103.50 / 1M characters

Gemini 2.5 Flash TTS API

Google

$11.50 / 1M characters

GPT-4o mini TTS API

OpenAI

$13.80 / 1M characters

ElevenLabs Turbo 2.5 API

ElevenLabs

$51.75 / 1M characters

Browse the full catalog — every model with its provider and per-unit price.