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 used Studio to author and host characters end-to-end, you can now compose the same capabilities in your engine or backend with Runtime SDKs and templates. These include knowledge retrieval, safety, long-term memory, expressive voice, emotion, and relationship modeling.
From Studio to Runtime
Since its inception, Inworld has built real-time AI interaction around characters that form relationships, express emotions, remember conversations, and respond naturally through voice.
Runtime makes that character-building expertise available as an AI orchestration toolkit. You get all of Studio's capabilities, including knowledge retrieval, safety checks, long-term memory, and expressive voice synthesis, with full visibility and control over how your characters are built and run.
Build your character with Runtime
Choose the platform that matches your stack. Follow its 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 to build characters in your engine.
Node.js
Start with the Voice Agent template, a full conversational character you can customize immediately.
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 | Inworld 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.
For help migrating a specific Studio workflow, use the in-app support widget or the Inworld community.