Xing 4.0 vs GLM 5.3 Prime
Xing 4.0 took 25 min 32 s and was free at list price, GLM 5.3 Prime took 49 min 31 s and $2.95 at list price. GLM 5.3 Prime took 1.9× as long.
Xing 4.0
XingChen · free route
GLM 5.3 Prime
Z.ai · $8.80/M out
Pelican
Generate an SVG of a pelican riding a bicycle
Watch
Draw a mechanical wristwatch that shows the current local time, with a sweeping seconds hand and a date window. Make it look expensive.
Landing
Build the landing page for Lumen Cycles, a Copenhagen workshop that builds custom cargo bikes to order. Make it look like a real brand you would trust with 4,000 euros.
Blank first frame. Press Run.
Breakout
Make a Breakout game I can play right now with the keyboard or the mouse. Give it several levels, a score and some juice.
About
Write the opening of the About us page for Patchbay, a three-person studio in Rotterdam that repairs vintage synthesizers. About 150 words.
Patchbay is a compact, three-person workshop rooted in the dynamic streets of Rotterdam, born from a shared reverence for analog sound. Our team shares an unwavering dedication to vintage synthesizers, viewing each oscillator, filter, and routing cable as a vital piece of sonic history waiting to be restored. Whether diagnosing a failing voltage regulator or carefully retrofitting obsolete components, we take immense pride in bringing classic instruments back to their full potential. In our studio, repairing isn't just a technical service—it is a shared passion among friends who believe the past deserves to keep playing. We meticulously diagnose and revive legacy synths, ensuring the iconic sounds of yesterday continue shaping today’s electronic music. Bring us your dented, broken machines, and let us help you reconnect them with the rich, unmistakable sounds they were always meant to make. Every patch, every knob, every fleeting tone depends on the work we do here.
Some of the machines we work on were built before any of us were born. Patchbay is a three-person repair studio in Rotterdam, and what we do is simple to describe: we keep vintage synthesizers playing. A Minimoog that sat in an attic for thirty years. A Juno-60 with keys that no longer speak. A modular system that hums where it should roar. Whatever comes through our door gets opened up, traced through, and brought back.
That means rebuilding power supplies, cleaning a thousand key contacts, chasing a fault across three boards until it turns out to be a single cracked solder joint. It means calibrating oscillators that have drifted for decades, and listening — really listening — until a filter sounds the way it did the day it left the factory.
We do this because these instruments still sound like nothing else, and because somewhere a player is waiting to hear one come back to life.
Specs and numbers
| Xing 4.0 | GLM 5.3 Prime | |
|---|---|---|
| Maker | XingChen | Z.ai |
| Made in | China | China |
| Released | 16 Oct 2026 | 23 Sep 2026 |
| Price in, per M tokens | free route (list $0/M) | $2.80 |
| Price out, per M tokens | free route (list $0/M) | $8.80 |
| Context | 262,144 tokens | 1,000,000 tokens |
| Weights | open | closed |
| Hacker News points | — | — |
| Time for the five prompts | 25 min 32 s | 49 min 31 s |
| List price of the five prompts | free | $2.95 |
Xing 4.0 was free at list price; GLM 5.3 Prime cost $2.95. Xing 4.0 was faster: 23 min 59 s less in total, and faster on 4 of the 5 prompts.
In the recording, both Breakout games play. Xing 4.0's landing page showed a blank first frame when the still was taken. GLM 5.3 Prime's landing page was cut off at the output limit (131,072 tokens). Xing 4.0 has no logo: doesn’t draw (an SVG file without the SVG namespace, which browsers draw as an empty box).