Inworld TTS

Inworld TTS

Inworld
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About

Inworld TTS is a state-of-the-art text-to-speech platform designed to deliver ultra-realistic, context-aware speech synthesis and precise voice-cloning capabilities at a radically accessible price. The flagship model, TTS-1, is optimized for real-time applications and supports low-latency streaming (first audio chunk in ≈200 ms) as well as multiple languages (including English, Spanish, French, Korean, Chinese, and more). Developers can use instant zero-shot voice cloning (5-15 seconds of audio) or professional fine-tuned cloning, add voice-tags for emotion, style, and non-verbal sounds, and switch languages while preserving voice identity. The larger TTS-1-Max model (in preview) offers even more expressive speech and multilingual strength. The platform supports both API and portal access, streaming or batch mode, and is designed for everything from interactive voice agents and gaming characters to branded audio experiences.

About

The gpt-4o-mini-realtime-preview model is a compact, lower-cost, realtime variant of GPT-4o designed to power speech and text interactions with low latency. It supports both text and audio inputs and outputs, enabling “speech in, speech out” conversational experiences via a persistent WebSocket or WebRTC connection. Unlike larger GPT-4o models, it currently does not support image or structured output modalities, focusing strictly on real-time voice/text use cases. Developers can open a real-time session via the /realtime/sessions endpoint to obtain an ephemeral key, then stream user audio (or text) and receive responses in real time over the same connection. The model is part of the early preview family (version 2024-12-17), intended primarily for testing and feedback rather than full production loads. Usage is subject to rate limits and may evolve during the preview period. Because it is multimodal in audio/text only, it enables use cases such as conversational voice agents.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Developers and businesses looking for a tool offering multilingual voice synthesis and custom-voice cloning at scale

Audience

Developers and teams in need of a tool to create voice agents or conversational applications with audio/text support and lower-cost models

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$0.005 per minute
Free Version
Free Trial

Pricing

$0.60 per input
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Inworld
Founded: 2021
United States
inworld.ai/tts

Company Information

OpenAI
Founded: 2015
United States
platform.openai.com/docs/models/gpt-4o-mini-realtime-preview

Alternatives

Qwen3-TTS

Qwen3-TTS

Alibaba

Alternatives

Qwen3-Omni

Qwen3-Omni

Alibaba
Chirp 3

Chirp 3

Google
Voxtral TTS

Voxtral TTS

Mistral AI
TextSpeech Pro

TextSpeech Pro

Digital Future
Fish Audio

Fish Audio

Hanabi AI

Categories

Categories

Integrations

OpenAI
Claude
Fireworks AI
GPT-4o
Google AI Overviews
Groq
Inworld
LiveKit
Mistral AI
Tenstorrent DevCloud
Vapi AI
WebRTC
gpt-oss-20b

Integrations

OpenAI
Claude
Fireworks AI
GPT-4o
Google AI Overviews
Groq
Inworld
LiveKit
Mistral AI
Tenstorrent DevCloud
Vapi AI
WebRTC
gpt-oss-20b
Claim Inworld TTS and update features and information
Claim Inworld TTS and update features and information
Claim gpt-4o-mini Realtime and update features and information
Claim gpt-4o-mini Realtime and update features and information