A one-song music video drawn in code, with no scene directions

HackerTube collects 6,454 YouTube videos that people kept recommending in 43 million comments over 20 years on Hacker News (a board where people share tech news). For about 2 hours, the person prepared only a key to look up video data, a server and a domain. Opus 5.5 handled analysis, security, deployment and optimization.

With almost no human work, a video site came out of a pile of comments, and you can watch it without a login.

Sonnet 5.5 and GPT-6 Astra got the same task, to build what you think you look like, and built side by side on a Minecraft server. Sonnet 5.5 placed blocks directly, with no commands, and raised a smiling sun with orange rays.

Within limits of 45 minutes, 10 build calls and 6,000 blocks, the model decided for itself how it looks and built it.

Industrial software that treats a warehouse like a strategy game was made with Opus 5.5. The screen looks like a game board. The software is built to run logistics like play.

A stiff warehouse-management screen can be made and used like a game.

With a single prompt, it made a launch promo video for Opus 5.5, complete with game-style background music. It used only 12% of the 5-hour usage limit.

It makes a whole video in its default state, with no extra tools or setup.

The video shows a Roblox screen (Roblox is a platform where anyone can build and publish games). A car stands on a yellow floor, with a speedometer and a bonus button on screen. The author wrote that Opus 5.5 helped bring Forza Horizon 6 to Roblox in about 8 hours.

The video shows only one car in Roblox and some on-screen elements, so the screen alone does not show how much of the original game the author moved.

With Opus 5.5 set to Max effort, its deepest thinking level, a single request asked for a 15-second motion graphic like a showreel (a short compilation video that shows off your skills) to attach to a résumé. The result was a video of bold CLAUDE lettering and the phrase motion designer moving across a red screen.

A self-introduction video that motion designers put real work into can come from a one-line request.

With Opus 5.5, the maker turned each star in the fairy tale The Little Prince into a 3D scene that players can walk around in. The scenes join into one game that follows the story. The maker used Tripo, an AI tool that makes 3D models, and the 3D program Blender. The work took 16 days.

The maker turned the story of one book into a 3D game that players walk through, in 16 days.

From a single request to explain how camera focus works, it worked for 1 hour 26 minutes and built a hands-on 3D lens lab web page. Turning the focus ring moves the glass elements inside the lens and shifts the plane in sharp focus forward and back through the scene. The API (the way programs call the model) cost $25.66.

In one pass, it turned optics that are hard to follow in text into a teaching tool you learn by turning it with your hands.

A new dashboard for Home Assistant, the smart home program, was built with Claude Code and Opus 5.5. It is a single page of HTML, JS and CSS, with no framework (a prebuilt development scaffold) and no npm. It includes screens for garden watering, home power, the electric car and lights by room.

Opus 5.5 handled everything from writing the code to preview testing, SSH (remote access) deployment and automation setup, and finished a screen that controls the whole home.

A train journey with scenery passing outside the window, drawn only with JavaScript code and no image files. It took a single prompt and about 45 minutes.

Even a printmaking (risograph) art style can be expressed in code.

Opus 5.5 at medium (middle reasoning effort) built the screens of SharkFin, a personal finance dashboard like Monarch. It connects to bank accounts and shows spending, net worth and a transaction list on computer and phone screens. It also has a page for cash flow by property.

On just 35% of the weekly limit of the $20-a-month Claude Pro plan, you can finish a personal finance app that keeps your data in your own hands.

Opus 5.5 made a UI motion video using only code. In it, a single shape keeps turning into screen elements such as a button and a music player. The video editor After Effects was not used at all, and the author also shared a prompt template for making the same video again.

Designers used to polish UI motion scene by scene in dedicated software. Now it can be made with a single prompt and an HTML file.

A game made over a weekend with Opus 5.5. A stickman walks around on a website screen and shoots weapons to scatter the text and break the screen. It also supports multiplayer with several people.

In a single weekend, the idea of turning a real web page into a playground became a game that can be enjoyed right away.

After a third round of refinement with Opus 5.5 at medium (middle reasoning setting), Blender (a 3D program), an image-generation AI and three.js (a web 3D tool) were combined into a game that runs directly in the browser. The screen shows a character standing on a skyscraper rooftop and a small map at the bottom right.

Making a game used to mean moving between many tools. One model stitched them together into a result you can open without installing anything.

Asked to design a microduck that could be built from real LEGO, Opus 5.5 designed a life-size model using 1,113 real LEGO parts. It checked 3,204 connections, found 0 places where parts collide, confirmed that every step can be assembled, and confirmed that the center of gravity sits inside the feet. It then made a 141-page LEGO-style manual with 237 steps, priced the parts in the browser and prepared an order on BrickLink (a LEGO parts marketplace).

The whole process of actually building a LEGO piece can be handed to the model, from design and structural checks to assembly instructions and parts ordering.

The host gave Opus 5.5 a few basic photos of the property, a 2D floor plan and Pinterest reference images. Opus 5.5 built a 3D world with Blender (a 3D creation program) and Unreal Engine 5 (a game engine). The screen shows a balcony with a sea view and WASD key controls.

From photos, a floor plan and reference images, one property became a 3D space that you can walk through.

The author asked why the Mac storage was full. Opus 5.5 scanned the whole disk and found 97GB of junk. It then built a cleanup screen that shows the junk.

One chat that asks why storage is full replaces a job that people pay $29 for in a paid cleanup app.

It moved HAProxy, the open-source tool that distributes requests in front of web services, from C to Rust in full. It passed nearly all of HAProxy's own tests in 9.5 hours, while Fable 5.1 took 12 hours on the same job.

It finished a migration that would take a human team weeks faster than a more expensive model, at 51% lower cost.

The author built a tentacle rig (a skeleton that gives motion) with Claude Opus 5.5. It uses matrix-based spline IK (a method where joints bend along a curve) in Bifrost (a node-based tool) in the 3D program Maya. The video shows a pink tentacle reaching out of a hole in a wall. An egg-shaped lump sits in its body, and its tip touches a dish on the floor.

It shows that a model can help build 3D motion that is hard to set up, such as a tentacle that bends along a curve instead of at joints.