World Labs dropped two new models for its Marble platform on April 2: Marble 1.1 and Marble 1.1 Plus. The update is the latest in a rapid clip of releases since the generative 3D world model launched commercially last November.
Marble 1.1 replaces the original as the default model, promising better output fidelity at the same 1,500-credit cost per world. Fine, but the real story is 1.1 Plus. Previous Marble versions generated worlds inside a fixed spatial footprint, which meant large environments required manual boundary adjustments. 1.1 Plus handles that automatically, expanding 3D coverage in a single pass when the scene calls for it, up to five "dynamic cubes." Pricing shifts accordingly: 1,500 credits base plus 300 per additional cube. That variable cost structure is new for the platform.
The release notes also list UI tweaks (a model selector in the omnibox, version labels on assets) and a couple of bug fixes for multi-tab session conflicts and visibility cascading in Studio. The older Marble 1.0 and 1.0 Draft models stick around for existing workflows.
World Labs, co-founded by Stanford AI researcher Fei-Fei Li, raised $1 billion in February from investors including Nvidia, AMD, and Autodesk. The company has been shipping fast since then: an API launch in January, and now two model upgrades in early April. Whether 1.1 Plus actually delivers meaningfully larger worlds in practice remains to be seen by users putting it through real workloads.
Bottom Line
Marble 1.1 Plus introduces variable-cost, auto-expanding 3D world generation at 1,500 credits base plus 300 per additional dynamic cube.
Quick Facts
- Marble 1.1: 1,500 credits per world (fixed cost, now the default model)
- Marble 1.1 Plus: 1,500 base + 300 credits per dynamic cube, up to 5 cubes
- Release date: April 2, 2026
- World Labs raised $1 billion in February 2026
- Marble originally launched commercially in November 2025
