World Labs has has announced a new public interface called the World API, extending the capabilities of it model, Marble. The release marks World Labs’ clearest step yet toward making spatial intelligence a programmable layer inside modern software.

The World API allows applications to generate explorable 3D worlds on demand from text, images, panoramas, multi view inputs, or video. Each request produces a navigable environment that can be rendered on the web, exported into downstream tools, or embedded into interactive systems and simulations. World Labs is no longer just offering a tool for creating worlds, but an infrastructure layer for applications that need them.

Developers submit a generation request and receive a fully navigable 3D environment in return. There’s no special setup, no proprietary runtime, and no requirement to maintain a traditional 3D production pipeline. In practical terms, that means spatial environments can be generated when they’re needed, inside games, creative tools, simulators, or consumer facing products, rather than pre authored months in advance. For developers, world creation becomes another programmable building block. For teams without deep graphics expertise, it lowers the barrier to working in 3D altogether.

World Labs points to several early domains where programmable world generation is already changing how teams work. In gaming and immersive media, the API is being used to turn existing visual content into explorable spaces. Platforms like Escape.ai are transforming 2D films into navigable 3D environments, allowing audiences to step inside scenes rather than passively watch them. A single video can become both a cinematic experience and a spatial world, opening new forms of interactive storytelling.

In robotics and simulation, the bottleneck is often environment diversity. Training and evaluating embodied systems requires large numbers of plausible spaces, but building them by hand is slow and expensive. The World API enables rapid generation of environments from minimal real world input, or entirely synthetic descriptions, and integrates with simulators such as NVIDIA's Isaac Sim. Research collaborations, including work with Lightwheel, highlight how scalable world generation supports evaluation across many environments rather than a small, carefully curated set.

The World API is available today through the World Labs platform, where users can generate API keys, manage usage and billing, and access documentation and sample projects. World generation's pricing is based on usage rather than tooling complexity.

World Labs frames the World API as an early step toward a future where spatial intelligence is as accessible as text or images are today. In that vision, worlds are generated as easily as prompts, and humans and agents alike can reason, collaborate, and interact inside them.

For the radiance field and Gaussian splatting community, the announcement is another signal that creating with 3D is getting more and more commonplace. With Marble’s world generation now exposed as an API, I expect to see both creators and businesses alike moving to gaussian splatting. Learn more about World Labs on their website.