Last reviewed · October 15, 2026

World Model Engines

Frameworks for memory, rules, player controls, and generation around world models.

Open source · Apache 2.0

GENESIS

By Sequencer · v0.1 source preview

A runtime and portable project format for playable experiences built around world models. Genesis coordinates persistent state, player actions, model requests, and the interface.

Memory & rules

Track inventory, characters, locations, quest progress, and shared outcomes.

Model context

Prepare text and optional image context, then connect your LLM and world model through adapters.

Player interfaces

Build custom controls, multiplayer turns, and audience decisions with HTML, CSS, and JavaScript.

Portable projects

Bundle settings, interface, controller, and declared assets for a compatible host.

License: Apache 2.0
Release: v0.1 source preview
Model connections: Worldstreams API or your own adapters
Usage costs: Connected models and hosting

The documentation describes a source preview, with npm publication being prepared. Your host supplies storage, credentials, permissions, and generation services.

Sources: Project overview · Architecture · License

Engines & models

An engine coordinates state and interactions. Connected models generate the media. Compare model capabilities and hourly billing separately.

Browse world models · Compare hourly pricing

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