Vidu S2-Avatar on Reactor: Bringing Digital Characters into Live Conversation
Vidu S2-Avatar is live on Reactor, bringing interactive AI characters to more creators and developers. With image-based character creation and real-time voice and text interaction, the partnership opens new possibilities for virtual hosts, interactive storytelling, and conversational experiences.
Vidu S2-Avatar is now available on Reactor, giving creators and developers a new way to build interactive AI characters using images, voice, and text.
A virtual host is in the middle of an introduction. A viewer asks a question, then follows up with something unexpected. The character needs to respond to that moment—not simply continue playing a prepared script.
This is the challenge behind interactive digital characters. A convincing appearance is only the beginning. The experience also depends on how the character listens, speaks, responds, and participates in an ongoing exchange.
Vidu S2-Avatar is designed for this kind of interaction. Through our partnership with Reactor, these capabilities are now available to more creators and developers building live, character-driven experiences.
Reactor made S2-Avatar available on its platform from day one, enabling its community to create interactive AI personas that can respond to audio and text inputs.
From a Character Image to a Live Conversation
Many avatar workflows begin with an image and a script, then produce a finished video. That approach works well for prepared presentations and recorded content.
Live interaction introduces a different requirement: the next response depends on what the user does.
With S2-Avatar on Reactor, users can create a character from a single photo, define its persona, choose a voice, and begin a live conversation. The character receives microphone input and responds with voice and lip-synchronized video.
Each input serves a practical purpose. The image establishes the character’s appearance. The persona defines its role and behavior. Voice and text allow the interaction to develop naturally as the session continues.
For creators, this opens up a different way to think about character design. Alongside deciding what a character looks like, they can also consider how it should participate—as a host, a guide, a fictional personality, or a conversational companion.
Interaction Requires More Than a Talking Face
The quality of a live character experience depends on the small details of a conversation.
Can users interrupt the character? Can they send a typed instruction? Can the character receive visual context when the application requires it?
Reactor’s S2-Avatar integration supports live conversations, typed input, and interruption controls. In video mode, the character can also receive input from the user’s webcam.
These capabilities provide a foundation for experiences that can change direction during a session. A user can ask a follow-up question, interrupt an answer, or continue the conversation through a different input method.
A created character can also be reused across calls without requiring the same photo to be uploaded again. This makes it easier to build recurring characters and persistent user experiences.
At Vidu, we see these interaction details as essential to making digital characters genuinely useful. Visual performance and conversational control need to work together.
Why Reactor Is an Important Platform Partner
Reactor is a developer platform focused on real-time generative media and world models. Its platform gives developers access to model playgrounds, APIs, and live-session workflows.
That focus makes Reactor an important partner for S2-Avatar.
Vidu provides the character-generation and real-time interaction capabilities. Reactor makes these capabilities accessible through its developer platform, giving its community a direct way to explore the model and integrate it into applications.
For developers, this creates a practical path from initial testing to product integration. They can begin by creating a character in the playground, test how it responds during a conversation, and then use the available API controls to build the experience into their own products.
Making S2-Avatar available on Reactor from day one also allows creators and developers to evaluate the technology through their own ideas, use cases, and technical requirements.
What Teams Can Build with S2-Avatar
The integration creates opportunities across a wide range of interactive experiences.
Live Hosts and Audience-Driven Characters
A virtual host can participate in a live exchange, respond to questions, and allow the audience to influence the direction of the conversation.
For creators, this offers a way to develop a character beyond a series of recorded appearances. The character can become part of an experience in which people actively participate.
Interactive Storytelling and Entertainment
A fictional character can become an interactive part of a story. Users might speak with a guide, question a character about a scene, or explore a narrative through conversation.
Developers remain responsible for the story structure and application logic. S2-Avatar provides the visual and spoken presence through which these interactions can take place.
AI Companions and Social Experiences
S2-Avatar can support digital characters designed for ongoing social interaction and companionship.
A consistent character appearance, natural spoken responses, and live conversational control can help create a stronger sense of presence than conventional text-based interfaces.
Games and Interactive NPCs
Game developers can explore characters that communicate with players through voice and video rather than relying entirely on predefined dialogue trees.
This creates opportunities for more responsive guides, quest characters, virtual hosts, and narrative experiences.
Learning and Customer-Facing Experiences
A conversational character can also serve as an interface for guided learning, product introductions, customer engagement, or user onboarding.
In these settings, the avatar becomes one part of a broader product experience. Reliable information, appropriate safeguards, and clear interaction design remain essential.
From Model Capability to Real-World Applications
The launch on Reactor represents more than adding another model to a platform. It connects Vidu’s real-time character technology with a development environment designed for interactive generative experiences.
For creators, this means a more accessible way to explore what an AI character can become.
For developers, it means a clearer route to testing, integration, and deployment.
For businesses, it creates new possibilities for building interactive experiences around virtual hosts, customer-facing characters, entertainment, education, games, and social applications.
The value of S2-Avatar ultimately depends on what users can build with it. That is why platform partnerships are an important part of the Vidu ecosystem.
Looking Ahead
For Vidu, partnerships like Reactor help connect model development with people building real applications.
Our goal is to make expressive digital characters easier to explore, integrate, and scale, while continuing to improve the underlying interaction experience.
Real-world use also helps surface the questions that matter most: how characters perform across different scenarios, how developers manage continuous sessions, and what users expect from a live interaction.
We look forward to seeing how the Reactor community approaches these questions—and what kinds of characters, products, and experiences emerge.
Vidu and Reactor will continue exploring opportunities to bring real-time generative media to more creators and developers. More product updates, application examples, and partnership news will be shared in the future.
Start Building with S2-Avatar
Begin with a character image and a clearly defined role. Start a conversation, change its direction, interrupt a response, and explore how the character fits into your intended experience.
Vidu S2-Avatar is now available on Reactor and through Vidu’s own API services.
Bring your character into the conversation. We can’t wait to see what you build.
