GPT-6.1 Terra vs GLM 5.3
GPT-6.1 Terra took 5 min 29 s and $0.15 at list price, GLM 5.3 took 22 min 22 s and $0.34 at list price. GLM 5.3 took 4.1× as long and cost 2.3× as much.
GPT-6.1 Terra
OpenAI · $5.00/M out · 706 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, dedicated to repairing vintage synthesizers and keeping them in use.
Old instruments have a way of becoming familiar: the feel of a key, the response of a filter, the particular sound a circuit makes when it’s working as it should. When something goes wrong, we take the time to understand both the fault and the instrument around it. We work carefully, preserving original parts wherever practical and making repairs with the long term in mind.
Our studio brings together a shared interest in electronics, sound and the machines that connect them. Whether a synthesizer has a stubborn key, a noisy output or has been silent for years, we’re interested in finding a way forward.
We work with musicians, collectors and anyone who wants to hear an old instrument come to life again. If you have a synth that needs attention, we’d be glad to hear about it.
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
| GPT-6.1 Terra | GLM 5.3 | |
|---|---|---|
| Maker | OpenAI | Z.ai |
| Made in | US | China |
| Released | 26 Oct 2026 | 18 Aug 2026 |
| Price in, per M tokens | $1.00 | $0.07 |
| Price out, per M tokens | $5.00 | $1.40 |
| Context | 1,050,000 tokens | 1,048,576 tokens |
| Weights | closed | open |
| Hacker News points | 706 | 3,306 |
| Time for the six prompts | 5 min 29 s | 22 min 22 s |
| List price of the six prompts | $0.15 | $0.34 |
GPT-6.1 Terra was cheaper: $0.19 less at list price, and less on 5 of the 6 prompts. GPT-6.1 Terra was faster: 16 min 53 s less in total, and faster on 5 of the 6 prompts.
In the recording, GPT-6.1 Terra'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: GPT-6.1 Terra's rebuild matched the screenshot at 95%; GLM 5.3 was not in it. Tea Garden experiment: GPT-6.1 Terra's game passed 5 of 5 checks, GLM 5.3's 1 of 5.