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Nari Labs

DiaAI text to speech

Two-speaker dialogue from a script: mark the speakers [S1] and [S2]. On Leap, it sits beside 174 other models in one studio.

  • Text to speech

1 clip on Dia: $0.054. Your words wait while you sign in.

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

Listen / Two voices and a front door

0 / 7 s
Read the transcript

[S1] Did you lock the front door? [S2] We have a front door? (laughs) [S1] I'm serious. [S2] Okay, okay. I locked it. Probably.

AI text to speech

Dia at a glance

Dia is a text-to-speech model from Nari Labs. It makes speech from your text.

Made by
Nari Labs
Makes
Speech
Starts from
Your text
Text
Up to 1,000 characters
Price per run
$0.054
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 Dia

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

Dia, answered

What is Dia?
Dia is a text-to-speech model from Nari Labs. Two-speaker dialogue from a script: mark the speakers [S1] and [S2]. On Leap it runs in one studio beside every other top model, with one account.
How much text can it read in one run?
Up to 1,000 characters. You pay for the characters you send, with the price shown before you press go.
How much does a run cost?
A run costs $0.054. You see the exact price before you press go, and a run that fails costs nothing.
Is Dia free to try?
No. There is no free credit: you add credit from $5, and your first top-up has no card fee. The cheapest run is $0.054 (a run), so $5 covers 92 of those. 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 nari-labs/dia-1.6b, 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 Nari Labs account?
No. Leap sends your request to Nari Labs' model and gives you what it makes. One Leap account runs Dia and every other model, in the studio, through the API and from your agents.

Your idea, Dia.

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

Make it with Dia

For developers

Run Dia from code

API docs
Model ID
nari-labs/dia-1.6b
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 1,000 characters, required

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: $LEAP_API_KEY" \  -H "content-type: application/json" \  -H "prefer: wait=60" \  -d '{    "model": "nari-labs/dia-1.6b",    "input": {      "text": "[S1] Did you lock the front door? [S2] We have a front door? (laughs) [S1] I'\''m serious. [S2] Okay, okay. I locked it. Probably."    }  }' # Video often outlasts the wait and answers "queued" or "running".# Put its "id" in GENERATION_ID and read it again until it is done:# curl https://api.tryleap.ai/v1/generations/$GENERATION_ID -H "x-api-key: $LEAP_API_KEY"