GLM 5.3 FlashX Legal vs GPT-6.1 Terra
GLM 5.3 FlashX Legal took 45 min 14 s and $0.42 at list price, GPT-6.1 Terra took 5 min 29 s and $0.15 at list price. GLM 5.3 FlashX Legal took 8.3× as long and cost 2.8× as much.
GLM 5.3 FlashX Legal
Z.ai · $1.25/M out
GPT-6.1 Terra
OpenAI · $5.00/M out · 723 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.
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 the repair and restoration of vintage synthesizers. We work on the machines that shaped the sound of the last fifty years — Roland, Moog, Yamaha, Korg, EMS, and the rest — from the rare and legendary to the well-loved and well-worn.
We started the studio because these instruments matter. They were built to be repaired, with discrete components, schematics, and construction that reward patience and care. Somewhere along the way, that way of making things fell out of fashion. We think it's worth keeping alive.
Every synthesizer that comes through our door is treated the same way: carefully diagnosed, honestly assessed, and repaired with respect for its original character. No unnecessary modifications, no shortcuts that compromise the instrument. Whether it's a failed voice chip, a dead key, or years of dust and neglect, our job is to put the machine back in the hands of the people who play it.
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.
Specs and numbers
| GLM 5.3 FlashX Legal | GPT-6.1 Terra | |
|---|---|---|
| Maker | Z.ai | OpenAI |
| Made in | China | US |
| Released | 2 Nov 2026 | 26 Oct 2026 |
| Price in, per M tokens | $0.37 | $1.00 |
| Price out, per M tokens | $1.25 | $5.00 |
| Context | 1,048,576 tokens | 1,050,000 tokens |
| Weights | closed | closed |
| Hacker News points | — | 723 |
| Time for the six prompts | 45 min 14 s | 5 min 29 s |
| List price of the six prompts | $0.42 | $0.15 |
GPT-6.1 Terra was cheaper: $0.27 less at list price, and less on 5 of the 6 prompts. GPT-6.1 Terra was faster: 39 min 45 s less in total, and faster on 5 of the 6 prompts.
In the recording, both Breakout games play.
Rebuild this screen experiment: GPT-6.1 Terra's rebuild matched the screenshot at 95%; GLM 5.3 FlashX Legal was not in it. Tea Garden experiment: GPT-6.1 Terra's game passed 5 of 5 checks; GLM 5.3 FlashX Legal was not in it.