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Seed Speech 2AI text to speech

ByteDance's speech model, in Chinese and English. On Leap, it sits beside 174 other models in one studio.

  • Text to speech

Your words wait while you sign in.

  • No subscription
  • Every top model, one account
  • Pay per run, priced before it starts

Listen / Cooking at 2 a.m.

0 / 8 s
Read the transcript

Welcome back to Cooking at Two A.M. Tonight: instant noodles, but we are going to treat them with the respect they deserve.

AI text to speech

Seed Speech 2 at a glance

Seed Speech 2 is a text-to-speech model from ByteDance. It makes speech from your text.

Made by
ByteDance
Makes
Speech
Starts from
Your text
Voices
41 to choose from
Text
Up to 5,000 characters
Price
$0.0405 per 1,000 characters
Updated
October 3, 2026
  1. 01Write the words, pick a voice
  2. 02See the exact price, then press go
  3. 03Keep it in your library, or take it further

Start with an idea

Three ways to try Seed Speech 2

Side by side

More voice and sound models on Leap

Why Leap

Why creators make it on Leap

  1. 01

    Every top model, side by side

    175 models from Black Forest Labs, Google, ByteDance, Kuaishou, Alibaba and more, side by side in one studio.

    See the models
  2. 02

    One click, or full control

    Character Studio, effects and recipes write the prompt for you. Or write your own for any model.

    See the tools
  3. 03

    Your work stays yours

    Everything you make stays in your library while your account is active, and you own what you make here.

    See what people make
  4. 04

    One balance for everything

    The studio, the API and your agents spend the same balance, and every run shows its price before it starts.

    How pricing works

Questions

Seed Speech 2, answered

What is Seed Speech 2?
Seed Speech 2 is a text-to-speech model from ByteDance. ByteDance's speech model, in Chinese and English. On Leap it runs in one studio beside every other top model, with one account.
Which voices can I use?
41 voices, among them Stokie en, Vivi mixed en zh ja es id, Mindy en es id pt zh, Dacey en and Tim en. You can hear each one in the studio before you run it.
How much text can it read in one run?
Up to 5,000 characters. You pay for the characters you send, with the price shown before you press go.
How much does a run cost?
It costs $0.0405 per 1,000 characters. You see the exact price before you press go, and a run that fails costs nothing.
Is Seed Speech 2 free to try?
No. There is no free credit: you add credit from $5, and your first top-up has no card fee. It costs $0.0405 per 1,000 characters. You pay per run, in dollars, with no subscription.
Can I use what I make commercially?
Yes. You own what you make on Leap, so you can use it commercially, and we never train AI on it. The people and brands shown in a result can still have rights in it; the Terms say more.
Is there an API?
Yes. Leap's REST API runs it as bytedance/seed-speech-2, at the same price per run as the studio, and agents can call it through Leap's MCP server. The request is at the bottom of this page.
Do I need a ByteDance account?
No. Leap sends your request to ByteDance's model and gives you what it makes. One Leap account runs Seed Speech 2 and every other model, in the studio, through the API and from your agents.

Your idea, Seed Speech 2.

Every run shows its price before it starts, and one that fails costs nothing.

Make it with Seed Speech 2

For developers

Run Seed Speech 2 from code

API docs
Model ID
bytedance/seed-speech-2
Makes
Voice and sound
Pricing
Per run, quoted first: POST /v1/quotes

Inputs

What the model takes. Leave out anything with a default.

Texttext
Text, up to 5,000 characters, required
Voicevoice
Stokie en, Vivi mixed en zh ja es id, Mindy en es id pt zh, Dacey en, Tim en, Kian en zh, Cedric en zh, Sophie en zh, Jean en zh, Magnus en zh, Mabel en zh, Nadia en zh, Opal en zh, Pearl en zh, Quentin en zh, Vienna mixed en zh, Alina mixed en zh, Corinne mixed en zh, Esther mixed en zh, Freya mixed en zh, Gigi mixed en zh, Holly mixed en zh, Lyla mixed en zh, Daisy mixed en zh, Tracy es zh, Jess ja es id pt en zh, Pinky es ko mixed en zh, Sweety ja es, Sandy es mixed en zh, Sven de, Minimi ja, Usseau fr, Felipe es, Han id, Martins pt, Enzo it, Shane ko, Bonnie zh, Felix zh, Celeste zh, Monkey king zh. Default: Stokie en
Sample Ratesettings.sample_rate
8000, 16000, 22050, 24000, 32000, 44100, 48000. Default: 24000Sample rate of the output audio in Hz.
Speedsettings.speed
0.5 to 2. Default: 1Speech speed.
Volumesettings.volume
0.5 to 2. Default: 1Volume.
Pitchsettings.pitch
-12 to 12. Default: 0Voice pitch shift in semitones.
Languagesettings.language
Zh, En, Ja, Es-mx, Id, Pt-br, Ko, It, De, FrForce the text to be read as a single language, disabling automatic language detection.

The request

The same envelope for every model; only the model and its input change. With prefer: wait=60 the answer holds the result when the run finishes within a minute; a longer one is read again by its ID. Agents can call it through the MCP server at app.tryleap.ai/api/mcp.

curl https://api.tryleap.ai/v1/generations \  -H "x-api-key: $LEAP_API_KEY" \  -H "content-type: application/json" \  -H "prefer: wait=60" \  -d '{    "model": "bytedance/seed-speech-2",    "input": {      "text": "Welcome back to Cooking at Two A.M. Tonight: instant noodles, but we are going to treat them with the respect they deserve."    }  }' # Video often outlasts the wait and answers "queued" or "running".# Put its "id" in GENERATION_ID and read it again until it is done:# curl https://api.tryleap.ai/v1/generations/$GENERATION_ID -H "x-api-key: $LEAP_API_KEY"