Kimi K3.1 Pro vs GLM 5.3
Kimi K3.1 Pro took 32 min 17 s and $1.27 at list price, GLM 5.3 took 22 min 22 s and $0.34 at list price. Kimi K3.1 Pro took 1.4× as long and cost 3.7× as much.
Kimi K3.1 Pro
Moonshot AI · $10.00/M out · 1,168 HN pts
GLM 5.3
Z.ai · $1.40/M out · 3,306 HN pts
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.
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.
Blank first frame. Press Run.
Logo
Design a logo for Night Heron, an independent bookshop that only opens after dark.
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 three-person studio in Rotterdam devoted to keeping vintage synthesizers alive, playable, and full of character. We work on instruments that have spent decades in studios, bedrooms, and tour cases, and we believe each one deserves more than a quick fix. From drifting oscillators and noisy sliders to tired keybeds and mysterious faults, we take the time to listen, diagnose, and repair with care.
Our approach combines patient troubleshooting, period-correct components where possible, and a deep respect for the original sound. We do not believe in erasing an instrument’s history; we preserve the quirks that make it worth loving. Whether your synthesizer needs a full overhaul or a little help getting back on stage, you will always know who is working on it and why. Patchbay exists for the joy of switching on an old machine and hearing it come back to life.
Patchbay is a three-person workshop in Rotterdam where vintage synthesizers come back to life. Whatever lands on our bench — a battered Minimoog, a Juno with dead keys, an ARP silent since the eighties — gets the same treatment: careful diagnosis, honest advice, and repairs done right.
We started Patchbay because we believe a good synthesizer shouldn't die of old age. These machines are more than circuits and sliders — they're the sound of records you grew up with, and the reason some of us got into music in the first place. Every one we fix goes back out into the world ready to make more.
Between us we handle everything from recapping and calibration to keybed work and the hunt for parts nobody has made in decades. It's slow, meticulous work, and we like it that way. If something in your collection hums, crackles, or refuses to turn on, bring it in — we'll see what we can do.
Specs and numbers
| Kimi K3.1 Pro | GLM 5.3 | |
|---|---|---|
| Maker | Moonshot AI | Z.ai |
| Made in | China | China |
| Released | 23 Oct 2026 | 18 Aug 2026 |
| Price in, per M tokens | $2.00 | $0.07 |
| Price out, per M tokens | $10.00 | $1.40 |
| Context | 1,048,576 tokens | 1,048,576 tokens |
| Weights | closed | open |
| Hacker News points | 1,168 | 3,306 |
| Time for the six prompts | 32 min 17 s | 22 min 22 s |
| List price of the six prompts | $1.27 | $0.34 |
GLM 5.3 was cheaper: $0.93 less at list price, and less on each of the 6 prompts. GLM 5.3 was faster: 9 min 55 s less in total, and faster on 4 of the 6 prompts.
In the recording, Kimi K3.1 Pro's Breakout game plays; GLM 5.3's stopped painting. GLM 5.3's Breakout game showed a blank first frame when the still was taken.
Rebuild this screen experiment: Kimi K3.1 Pro's rebuild matched the screenshot at 87%; GLM 5.3 was not in it. Tea Garden experiment: Kimi K3.1 Pro's game passed 5 of 5 checks, GLM 5.3's 1 of 5.