27 Things People Built With Claude Opus 5.5

What Are the Best Claude Opus 5.5 Demos?

The Antikythera Diving Game by edwinarbus is the clearest place to start. Its playable screen places a diver beside a shipwreck, with a Begin the Dive prompt and movement controls visible on the page. The premise is immediately understandable, and the interaction is presented as part of the scene rather than as a separate explanation. With 73,324 views on X, it is also the most viewed Claude Opus 5.5 example here.

MatthewBerman’s San Francisco City Simulation in Unreal Engine moves to a much larger setting. It shows a stylized 3D city populated by moving cars, pedestrians, and other simulated activity. That combination of streets, buildings, traffic, and people makes it a useful example for anyone searching for simulation work. Its 34,769 X views place it second among these demos.

For a recognizable game format, bridgemindai shared Claude Opus 5.5 just ONE SHOT a Mario Kart game. The demo presents a kart game and says it was made in one shot. chetaslua took a different route with Claude opus 5.5 made this launch video in JS, using an original tweet as the input and making the music, sound, images, and other assets in code.

PonteMLX MLX Process Visualizer by viticci is the strongest work-oriented example near the top. Its classic-style dashboard represents MLX token processing as a flowing river, supported by API gateway indicators and RAM usage. It turns an internal process into a visual interface with a distinct setting instead of relying on a plain monitoring panel.

What Kinds of Games Can Claude Opus 5.5 Build?

The game demos range from focused mechanics to broader worlds. Bow-and-Arrow Game Demo by BhavikY663 shows a bow aimed down a decorated lane, along with a timer and a GO prompt. fuzzzypan’s yacht game adds selectable camera angles, sea levels, times of day, and a horn. Those examples concentrate on a clear activity and put the relevant controls on screen.

Two creators shared demos titled The Ashen Gate Title Screen. Dr_Singularity’s version places the title and a small emblem over a dark pixel-art cityscape. 0x0SojalSec presents the name over a shadowy castle scene. Together, the demos show two visual directions for introducing a dark game world before play begins.

A Multiplayer Lawn-Mowing Simulator by _MaxBlade uses a deliberately ordinary task as its game loop. The first-person view shows someone steering a mower while other players are nearby, with the streamer appearing in an inset. Playable Game Boy Color in a Browser by chrisfirst instead recreates a handheld-style screen and shows a game running inside it.

Spark Garden across retro consoles by davidpwalter explores the same pixel-art game across Game Boy Color, Game Boy Advance, and Nintendo 64 versions. Thomas_jorgen shared a multiplayer ARK Survival Island game made with Claude Opus 5.5 and TesanaAI, which the creator says they played online. Rubzem shared an old-school dark fantasy RPG with multiple zones, quests, and voice-acted dialogue. zudasworld’s world-travel game spans 18 countries, with taxi rides, exploration, Niagara Falls, and the Louvre among the described activities.

Can Claude Opus 5.5 Make Coded Animation?

Every frame of this video is pure JavaScript by hanifproduktif describes a full animated video produced from one prompt through Tesseract running on Opus 5.5. BiosRiosz shared another JavaScript video built without footage or 3D software. Its motion comes from 24,000 dots that run, gallop, fly, and swim.

srikanthvaluri’s 20-second Deep-Sea Lighthouse short uses HTML5 Canvas without images or libraries. Its textures, gears, and light are generated in code. The result gives searchers a concrete example of animation assembled from programmed visual elements rather than recorded material.

Three models build animated post-apocalyptic scenes by thehypedotnews provides a comparison format. It presents three HTML-based Three.js films across model outputs, using an amusement park, a ghost town, and a nuclear plant as the settings. The changing environments make the outputs easier to compare than three variations of one scene would be.

Can It Build Interactive and 3D Scenes?

Tour a little neighbourhood by chetaslua offers a small interactive setting where Claude helps residents with everyday tasks. Its appeal comes from connecting several people and activities through one explorable neighborhood instead of presenting an isolated screen.

Animated SVG City Scene by Ananth7e depicts buildings, trees, clouds, and passing traffic on a small city street. Furry Cat Scene in Three.js by scottstts shows an orange-and-white furry cat standing on a colorful circular platform. One focuses on an animated environment, while the other centers a character inside a browser-based 3D scene.

Can Claude Opus 5.5 Build Work Interfaces?

Drata Login Page with Two User Flows by cherifdesigns is a practical interface example. It separates login and account creation into tabs, includes sign-in options, and balances the form with a halftone-style visual on the right. The demo is interesting because the two user paths are visible within one coherent page.

Finance app landing page with a 3D background by kevinkern takes a presentation-led approach. The headline Everything in one place sits over a muted 3D-style background with floating panels. Marketing Team Workflow Dashboard by TheViableEdge uses a dark interface to show project and status information alongside a presenter webcam view.

jayypatel18 shared a more analytical tool built from the request to show who was reading a website, divided between AI crawlers and real visitors. The creator says one prompt through Traceten MCP produced the visual and the insights. It is a focused example of turning a monitoring question into an explanatory display.

What Else Are People Making With It?

FireRed/LeafGreen Fan-Parody Title Card by Fanfulladev uses a dark introduction for an unaffiliated fan parody of the Pokémon FireRed and LeafGreen opening, featuring Anthropic and OpenAI mascots. It rounds out the examples with a recognizable title-card format rather than another game interface or dashboard.

Taken together, the shared Claude Opus 5.5 demos cover playable browser games, multiplayer concepts, simulated cities, coded films, animated SVG scenes, process visualizers, login flows, dashboards, and promotional pages. The most useful examples are the ones that make their purpose visible immediately through a playable prompt, clear controls, moving activity, or a focused interface.