Moonshot AI's Kimi launches game development package with K3.1 agents inside Unity, Unreal Engine and Blender

Moonshot AI has released a game development and creative work solution for Kimi that runs K3.1 agents directly inside Unity, Unreal Engine and Blender. The package combines the Kimi K3.1 model series, the Kimi Code and Kimi Work agent products, and plugins for professional tools. Kimi says it is meant to help studios test gameplay ideas sooner, move engineering and art production forward, and feed player feedback from launch and live operations into the next development cycle.

How the agents work

According to Kimi, the model reads design documents, screenshots, code and 3D assets, then plans the work. Kimi Code handles implementation and changes inside a codebase. Kimi Work takes on multi-step production tasks that span several files. Through plugins and tool calls, Kimi operates on existing projects and returns editable files along with a record of what it did.

In Unity and Unreal Engine, once Kimi has the project files and necessary permissions, it first maps the code structure, scene hierarchy and module dependencies. It then makes changes through editor plugins and checks the result against reproduction steps, logs and runtime data. Code diffs and verification records are kept for engineers to review.

Unity China integration

For Unity, Kimi models work with Tuanjie Codely Agent, a game development agent from Unity China built into the Tuanjie Engine. Kimi interprets the developer's intent, writes code and analyzes screen recordings and test results. The Codely agent runs operations inside the engine through editor and runtime scripts. In one demonstration, Kimi says, the system worked for 20 hours without human intervention, recreating an existing game and producing a native project that can be developed further.

Showcase builds

The launch page lists several builds credited to Kimi K3.1 Pro:

• Blender: an indoor rainforest valley, rendered as a 17.5-second, 1920x1080, 60 fps flythrough.
• Blender (browser): a cathedral interior with about 3.3 million triangles and 8,368 animated components.
• Unreal Engine 5.8: a celestial palace scene with a colonnade of 36 bays on a 1,750-meter radius and a procedurally modeled dragon, totaling 36 million triangles rendered with Nanite and Lumen.

Kimi also says designers without coding experience can produce playable Godot prototypes in one to two days.

Beyond production

The solution also covers batch creation of ad creatives, in-game assistants connected through the Kimi API, sorting of community feedback with sources attached, localization drafts with back-translation checks, and first-pass screening of user-generated content. Kimi recommends starting with a single, well-bounded task and judging pilots on time saved, output quality and how much human revision is still needed. Pricing for the package is not yet disclosed.

What this means

The launch is a packaging of existing Kimi K3.1 models and agent products into specific engine workflows, not a new model. The practical emphasis is on auditability: Kimi says it retains code diffs and verification records for engineer review, and that it returns editable files rather than opaque output. The Unity path runs through Unity China's Tuanjie Codely Agent, which executes operations inside the engine, while Kimi supplies intent interpretation, code and analysis. Kimi's own guidance, to pilot one bounded task and measure time saved, quality and remaining human revision, gives studios a concrete way to evaluate the claims, including the 20-hour unattended run, against their own projects.