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At Vibecon NY 2026, mimikry built a real-time AI city-generative experience

Real-time AI Experience Replit

Tech

2026

Case

Mimikry AI

table of contents

The Challenge

The Solution

Full Story

table of contents

The Challenge

The Solution

Full Story

table of contents

The Challenge

The Solution

Full Story

highlight

"The interesting creative decision isn't what you generate but what you make impossible to generate."

485

unique cities generated

The Challenge

Most live AI demos at conferences are either pre-rendered and pretend to be live, or genuinely real-time but visually underwhelming. The hard problem isn't generation speed.

It's coherence: making something that generates differently every time but still reads as a unified, intentional world.

Vibe City had to be both.

The Solution

Vibecon NYC curated by Replit, approached mimikry to create a live installation that could demonstrate real-time generative AI in a way that felt participatory, not passive. The goal was a proof of concept for what creative AI infrastructure looks like when it's built for experience, not for efficiency.

The constraint: it had to run live, in public, on consumer hardware, without a cloud dependency, and it had to hold up in a room full of people who build with AI for a living.

Full Story

What we built

A real-time AI city-block generator running simultaneously across six tablets, each showing a different block of the same city, generated live, updating in real time as the audience watched.

No pre-rendered assets. Everything ran on-device, built on a mix of local models and ComfyUI, tuned specifically for the aesthetic logic of the installation.

The city had rules. Not just visual rules but generative constraints: what kinds of buildings could appear next to each other, what materials existed in this world, what didn't. The model couldn't generate anything outside those constraints.

What happened in the room

Fenja and Noel presented Vibe City as part of a 45-minute keynote at Vibecon NYC on June 17–18, 2026, in front of an audience of practitioners building with AI.

The core thesis the installation was built to demonstrate: the interesting creative decision isn't what you make possible to generate. It's what you make impossible.

The same logic that made Vibe City architecturally coherent across six screens in real time is what makes a custom AI model trained on one brand's data generate on-brand every time, at scale, without a human reviewer catching drift.

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