Reactor has added NVIDIA and Sapphire Ventures as investors in its Series A financing round, led by Lightspeed Venture Partners, as the company scales infrastructure for real-time generative video and world models.
Reactor is building a developer platform designed to provide the compute and infrastructure needed to run increasingly complex world models interactively.
World models are evolving beyond conventional video generation toward AI systems capable of simulating, understanding and interacting with dynamic environments.
Running those models in real time can require substantial GPU resources along with inference and networking infrastructure capable of responding with extremely low latency.
Reactor’s platform combines a proprietary inference engine, global GPU cloud and low-latency streaming layer.
The company says its infrastructure can run models at more than 60 frames per second with latency below 40 milliseconds.
Developers access those capabilities through a unified software development kit and API designed to abstract the underlying complexity of deploying and scaling AI models.
Reactor is already being used across media and entertainment, with Hollywood studios, advertising platforms and video streaming services running projects on the platform.
World-model laboratories in the U.S. and internationally also use Reactor’s infrastructure, while hundreds of developers are building applications on the platform.
The company sees robotics and physical AI as another major use case.
As robot policies and world models become more computationally demanding, Reactor can run those models in the cloud and stream observations and actions between the model and a physical system in real time.
Reactor can also operate world models as closed-loop simulated environments.
That allows robotics teams to train and evaluate robot policies inside responsive generated environments without depending entirely on physical robots or manually constructed simulators.
The platform can support both open-source models and proprietary customer-owned systems across serving, evaluation and training.
Reactor was co-founded by CEO Alberto Taiuti and CTO Bryce Schmidtchen, both former technical leads on Apple Vision Pro.
Taiuti previously co-founded Luma AI and served as its CTO, where he helped develop infrastructure supporting 3D and video generation.
Reactor’s broader team includes engineers and researchers with backgrounds at Apple, Meta, Google, Adobe, Replicate and Microsoft.
The Reactor platform is currently available through its SDK and API, with usage-based pricing that varies by model.
KEY QUOTES:
“Every time computing has shifted from passive to interactive, entirely new applications have become possible. That’s what’s happening with world models now. Whether you’re building a new media experience or training an autonomous system, the underlying challenge is the same: these models require enormous amounts of compute, and they need to respond in real time. We built Reactor so developers can focus on what they want to create rather than the infrastructure required to make it work.”
Alberto Taiuti, Co-Founder and CEO of Reactor
“Every enterprise team building interactive video, gaming or robotics applications eventually runs into the same wall — the infrastructure required to serve these systems in real time. Reactor’s purpose-built platform solves this very challenge, and its early production deployments across media and robotics demonstrate the breadth of the opportunity. We’re excited to partner with Alberto, Bryce and the Reactor team as they work to establish the infrastructure layer for real-time world models.”
Anders Ranum, Partner at Sapphire Ventures
“A year ago, developers were asking us whether real-time world models were even possible. Now they’re asking how quickly they can put them into production. We’re seeing studios use these systems in live production workflows and robotics teams explore how to run increasingly sophisticated models without putting all of that compute on the robot itself. We’ve moved from ‘is this real?’ to ‘how do I build with it?'”
Ahmed Ahres, Head of GTM at Reactor
