Inworld AI: inworld-tts-1-5-max

Inworld TTS-1.5 Max is a high-fidelity text-to-speech model engineered for expressive voice synthesis with rich prosody, nuanced emotional range, and broadcast-ready audio quality. It supports a wide set of languages and delivers more natural pronunciation and expressive variation suitable for narration, content creation, and immersive character voices. The Max variant prioritizes audio quality and expressiveness while still supporting responsive generation.

Compare models

inworld-tts-1-5-max

AvailableInworld AIText to speechSync

Price: From $0.00005
Modalities: Audio

Getting started

Create API key
Create a key in Console, then use it with every model on the platform.

Send your first request

Copy the example for your language and run it against the endpoint.

Text to speechTokenLab endpoint

POST/v1/audio/speech

curl -X POST "https://api.tokenlab.sh/v1/audio/speech" \
  -H "Authorization: Bearer sk-xxx" \
  -H "Content-Type: application/json" \
  -d '{
  "operation": "tts",
  "model": "inworld-tts-1-5-max",
  "input": "Hello from TokenLab.",
  "voice": "alloy"
}'

Pricing

Official price is the model maker's public baseline. TokenLab price is what you pay for this model on TokenLab.

Text to speech

Per 1M characters

Official price: $0.00005
Official: $0.00005
Discount: -

	Official pricePer 1M characters	OfficialPer 1M characters	Discount
Text to speech	$0.00005	$0.00005	-

Usage & activity

Success rate is the share of requests that completed. Latency is how long a full response takes; P95 means 95% of requests finished within that time.

Usage & availability

Last 24 hours

No data yet

Model performance

Last updated Oct 1, 2026, 05:28 AM UTC

Metrics appear once privacy and data volume thresholds are met.

Data is based on aggregate user requests, excluding status checks.

Open in Console

Open Inworld TTS-1.5 Max in Console with a prompt ready to edit or send.

Help me try inworld-tts-1-5-max with a short audio request at /v1/audio/speech. Show the result and cost.

Use cases

Voice UX

Generate narration, onboarding audio, and spoken UI responses.

Side-by-side test

Compare response quality, latency, and price side by side.

Prompt examples

Generate calm onboarding narration for a developer tool.

Send the smallest possible request and show me the result and cost.

Compare this model with a cheaper one in the same category — when is each worth it?

FAQ

How much does Inworld TTS-1.5 Max cost?

On TokenLab, Inworld TTS-1.5 Max costs - . The pricing table above shows the full breakdown. Rates depend on the billing unit, specification, and usage. Compare matching conditions in the model's detailed pricing; a single rate does not determine the total cost.

What is Inworld TTS-1.5 Max best for?

Inworld TTS-1.5 Max supports Text to speech. You can open it directly in Create.

How do I test Inworld TTS-1.5 Max?

Open Inworld TTS-1.5 Max in Create. A sample for /v1/audio/speech will be ready to try.

Which endpoint should Inworld TTS-1.5 Max use?

Use https://api.tokenlab.sh/v1/audio/speech for Inworld TTS-1.5 Max. The request example below shows the matching code shape.

Can I test Inworld TTS-1.5 Max before integrating it?

Yes. Open Console starts a ready draft for Inworld TTS-1.5 Max and keeps your prompt after sign-in, so you don’t lose context.

Which operations does Inworld TTS-1.5 Max support?

Inworld TTS-1.5 Max supports Text to speech. Select an operation above to see its endpoint and request example.