Character Studio deprecation
The legacy Inworld Character Studio has been retired. This guide explains what changed and how to rebuild your characters with the Inworld Agent Runtime.
What changed
The legacy Character Studio (characters, scenes, knowledge, triggers, variables, interactions, integrations, voice studio, custom pronunciations, player profiles) is no longer available. The workflows that used to live in Studio have moved to the Inworld Portal and the Inworld Agent Runtime.
If you previously used Studio to author and host characters end-to-end, you'll now compose the same capabilities — knowledge retrieval, safety, long-term memory, expressive voice, emotion, and relationship modeling — directly in your engine or backend using the Runtime SDKs and templates.
From Studio to Runtime
Inworld has been pioneering character-first, real-time AI interaction since our inception — characters that form relationships, express emotions, remember conversations, and respond naturally through voice.
Runtime is Inworld's AI orchestration platform that takes that character-building expertise and exposes it as a composable toolkit. You get all of Studio's capabilities — knowledge retrieval, safety checks, long-term memory, expressive voice synthesis — with full visibility and control over how your characters are built and run.
Build your character with Runtime
Pick the platform that matches your stack and follow the corresponding Character template to recreate (and extend) your Studio workflow.
Unity
Download the Unity AI Runtime SDK and use the Character template to build AI characters in Unity.
Unreal Engine
Download the Unreal Agent Runtime SDK and use the Character template — our industry-leading Character Studio, in-engine.
Node.js
Start from the Voice Agent template — a full conversational character you can immediately customize.
Unity
The Unity AI Runtime SDK provides the components you need to build AI characters directly in your Unity project.
- Build your own character — Step-by-step guide to authoring a character by editing graph data, swapping personas, and wiring up the character interaction scene.
- Character Interaction Demo by Primitives — A runnable demo that combines LLM, TTS, and STT primitives into a complete character interaction. Use it as a reference for composing your own.
Unreal Engine
The Unreal Agent Runtime SDK brings Inworld's character authoring directly into your editor.
- Character template — A comprehensive system for AI character interaction, including character and player components, profiles, dialogue and emotion graphs, voice, and lip-sync.
Node.js
If you're building a backend or web experience, start from the Node.js Voice Agent template.
- Voice Agent template — A full conversational character implementation that you can customize end-to-end.
Where Studio features live now
| Studio concept | Runtime equivalent |
|---|---|
| Characters / scenes | Character templates in Unity, Unreal, or Node.js |
| Knowledge | Knowledge primitives (see the Unity Knowledge demo) |
| Voice studio / pronunciations | Realtime TTS, Voice cloning, Custom pronunciation |
| Triggers / variables / integrations | Compose with the Runtime graph and your own application logic |
| Player profiles | Player components in the Unity and Unreal Character templates |
Next steps
Open the Inworld Portal
Manage workspaces, API keys, billing, and observability.
Runtime overview
Explore all Inworld products — TTS, STT, Realtime, Router, and Runtime SDKs.
Need help migrating a specific Studio workflow? Reach out via the in-app support widget or the Inworld community.