How does Roblox Build create a game from a prompt?

Roblox Build reads a prompt like 'cozy adventure game set in a dense forest', then a chain of Roblox models produces the first playable version — gameplay mechanics, 3D environment, characters, visual style, and sound. Roblox says Build routes across its Cube 3D foundation model, its Procedural Models for parametric assets, and a mix of open-source and proprietary models.

When can I try Roblox Build and where?

Roblox Build enters public alpha on July 28, 2026, and only in New Zealand at first. Users must verify they are at least 9 years old to create with Build inside the mobile app; publishing a Build creation to the global Roblox audience requires being 16 or older. Roblox plans a phased rollout to more regions after the alpha.

How much does Roblox Build cost?

Roblox has confirmed a free basic tier of Build with paid options on top, but has not yet published the exact prices or what the paid tiers include. Roblox says the same Build back end is shared with Roblox Studio, so creators can move between mobile Build and desktop Studio using the same account, models, and chat history.

Will AI-generated Roblox games flood the platform's homepage?

Roblox says Build creations are ranked by the same discovery system that ranks every other Roblox game — long-term player retention. In the company's words, 'if no one plays it — no one can find it.' AI-made games that don't hold players won't be surfaced on the homepage, and Roblox is adding AI playtesting and analytics agents to help creators improve retention.

Roblox · 2026-07-16 · major

Roblox Build — mobile AI turns a text prompt into a playable game

Roblox Build is a mobile creation tool that turns a plain-English prompt into a playable Roblox game. Public alpha starts July 28 in New Zealand for verified users aged 9 and up; publishing requires age 16.

Roblox Build promo card showing the mobile creation flow

A text prompt on your phone now compiles into a playable Roblox game, alpha on July 28 in New Zealand.

Quick facts

Maker	Roblox
Product	Build (mobile AI creation)
Input	Text prompt on the Roblox mobile app
Models	Cube 3D foundation model, Procedural Models, plus third-party AI
Alpha	New Zealand only, starts July 28, 2026
Age gate	Verified 9+ to create; 16+ to publish globally
Pricing	Free basic tier with paid options

What is it?

Build is a new AI creation mode inside the Roblox mobile app. A user types a plain-English description of the game they want, and Build produces a first playable version they can then edit, test, and share. Roblox announced Build on July 16, 2026, with public alpha starting July 28 in New Zealand.

How does it work?

Prompts route through a stack of Roblox's own AI models — the Cube 3D foundation model for shapes, Procedural Models for parametric assets, and a coming scene-generation model — mixed with third-party open-source and proprietary models for gameplay logic, art style, and sound. Build shares its back end, models, and chat history with the desktop Roblox Studio, so a mobile creator can jump into full Studio later without losing state.

Why does it matter?

Roblox has ~380 million monthly active users and about 6 million active creators; Build is the first time the mobile app itself becomes a game-making tool for those users. If Build lands, the barrier to shipping a Roblox game drops from 'learn Roblox Studio on a laptop' to 'type a sentence on your phone'. Roblox is guarding the front page by tying Build discovery to the same retention-based ranking that governs every other Roblox game, so low-effort AI slop should stay out of the homepage even as the raw volume of new games spikes.

Who is it for?

Roblox creators without a PC, and studios watching how a mainstream mobile-first text-to-game tool ships

Frequently asked questions

How does Roblox Build create a game from a prompt?: Roblox Build reads a prompt like 'cozy adventure game set in a dense forest', then a chain of Roblox models produces the first playable version — gameplay mechanics, 3D environment, characters, visual style, and sound. Roblox says Build routes across its Cube 3D foundation model, its Procedural Models for parametric assets, and a mix of open-source and proprietary models.
When can I try Roblox Build and where?: Roblox Build enters public alpha on July 28, 2026, and only in New Zealand at first. Users must verify they are at least 9 years old to create with Build inside the mobile app; publishing a Build creation to the global Roblox audience requires being 16 or older. Roblox plans a phased rollout to more regions after the alpha.
How much does Roblox Build cost?: Roblox has confirmed a free basic tier of Build with paid options on top, but has not yet published the exact prices or what the paid tiers include. Roblox says the same Build back end is shared with Roblox Studio, so creators can move between mobile Build and desktop Studio using the same account, models, and chat history.
Will AI-generated Roblox games flood the platform's homepage?: Roblox says Build creations are ranked by the same discovery system that ranks every other Roblox game — long-term player retention. In the company's words, 'if no one plays it — no one can find it.' AI-made games that don't hold players won't be surfaced on the homepage, and Roblox is adding AI playtesting and analytics agents to help creators improve retention.

Try it

Public alpha opens July 28, 2026 for verified Roblox users in New Zealand