Inworld AI
Voice, speech and LLM APIs for AI characters
- Best for
- Teams building cloud-powered talking characters who want text-to-speech, speech recognition and LLMs from one provider
- Makes
- Real-time voice and dialogue for AI characters, through cloud APIs and engine SDKs
- Made by
- Inworld AI
- Where you use it
- Web, Unity Editor, Unreal Editor
- Engines
- Unity, Unreal Engine
- Pricing
- Pay as you go (On-Demand, $0/month) with TTS-2 at $25 per 1M characters and speech recognition at $0.15/hour; monthly plans from $25 lower the rates (as of October 2026)
- Free plan
- Yes
- Open source
- No
- Export
- Not applicable: Inworld is a usage-billed cloud service, so a game that uses it calls Inworld's APIs while it runs
- Status
- Available
Inworld AI sells real-time voice models and LLM access as cloud APIs. Its homepage now pitches the platform for consumer apps in general, and its pricing page lists a Games & Media use case for game voices and live dialogue.
For game developers, Inworld's docs say the older Character Studio has been retired. In its place are the Agent Runtime toolkit, which covers knowledge retrieval, safety checks, long-term memory and voice, plus a Unity AI Runtime SDK and an Unreal Agent Runtime SDK, each with a Character template, and a Node.js voice agent template for web projects. In practice you chain speech recognition, a language model and text-to-speech yourself, using those templates as a starting point.
Inworld has a history in games. At GDC 2024, Ubisoft showed its NEO NPCs prototype built with Inworld's technology and NVIDIA ACE, and Inworld and NVIDIA showed the Covert Protocol demo, according to NVIDIA.
As of October 2026, Inworld's pricing page bills by use: on the On-Demand plan, TTS-2 costs $25 per million characters, speech recognition $0.15 an hour and open LLMs from $0.07 per million input tokens. Monthly plans from $25 include credits and lower rates. Because billing is per character, hour and token, costs rise with how much players talk. AIGamer hasn't tested Inworld; see our AI NPCs guide.
Plans and pricing
| Plan | Price | What you get |
|---|---|---|
| On-Demand | $0/month, pay as you go | TTS-2 $25/1M characters, TTS-2 Flash $15, STT $0.15/hour, LLMs from $0.07/1M tokens; up to 70 min of TTS or 400 min of STT free |
| Creator | $25/month | $25 in monthly credits; TTS-2 $20/1M characters; STT $0.10/hour |
| Builder | $100/month | $100 in credits; TTS-2 $17.50/1M characters |
| Developer | $300/month | $300 in credits; TTS-2 $15/1M characters |
| Growth | $1,500/month | $1,500 in credits; TTS-2 $12.50/1M characters |
| Enterprise | Custom | Contact sales |
From Inworld AI's own pricing page, checked 29 October 2026. Prices change; check before you buy.
Limitation: Inworld retired its no-code Character Studio, so characters are now built in code with its Agent Runtime SDK templates, according to its deprecation notice.
FAQ
Is Inworld AI free?
There's no monthly fee on the On-Demand plan, and its pricing page says it includes up to 70 minutes of TTS or 400 minutes of speech recognition free for testing. After that, usage is billed per character, hour or token.
Does Inworld work with Unity and Unreal?
Yes. Inworld's docs point to a Unity AI Runtime SDK and an Unreal Agent Runtime SDK, each with a Character template for building AI characters.
What happened to Inworld Character Studio?
Inworld retired it. Its docs say the Agent Runtime and the Unity and Unreal SDK templates replace it, with knowledge, voice and memory features moved into those tools.
How much does Inworld TTS cost?
On the pay-as-you-go plan, TTS-2 costs $25 per million characters and TTS-2 Flash $15, as of October 2026. Monthly plans lower the rate, to $20 per million characters on the $25 Creator plan.
Sources
Compiled by AIGamer from Inworld AI's own pages and the sources below, checked 29 October 2026. We haven't tested Inworld AI hands-on.
- Inworld AI: Pricing
- Inworld AI: Homepage
- Inworld AI: Character Studio deprecation (docs)
- NVIDIA: Ubisoft's NEO NPCs Explores the Possibilities of Digital Humans in Games with Inworld AI & NVIDIA ACE Technologies
Image: Inworld AI
Written in our own words; quotes are marked and credited. How we report